Standards - Mathematics

MA19.6.1

Use appropriate notations [a/b, a to b, a:b] to represent a proportional relationship between quantities and use ratio language to describe the relationship between quantities.

Unpacked Content

Knowledge

Students know:
  • Characteristics of additive situations.
  • Characteristics of multiplicative situations

Skills

Students are able to:
  • Compare and contrast additive vs. multiplicative contextual situations.
  • Identify all ratios and describe them using "For every…, there are…"
  • Identify a ratio as a part-to-part or a part-to whole comparison.
  • Represent multiplicative comparisons in ratio notation and language (e.g., using words such as "out of" or "to" before using the symbolic notation of the colon and then the fraction bar. for example, 3 out of 7, 3 to 5, 6:7 and then 4/5).

Understanding

Students understand that:
  • In a multiplicative comparison situation one quantity changes at a constant rate with respect to a second related quantity. -Each ratio when expressed in forms: ie 10/5, 10:5 and/or 10 to 5 can be simplified to equivalent ratios, -Explain the relationships and differences between fractions and ratios.

Vocabulary

  • Ratio
  • Ratio Language
  • Part-to-Part
  • Part-to-Whole
  • Attributes
  • Quantity
  • Measures
  • Fraction

MA19.6.2

Use unit rates to represent and describe ratio relationships.

Unpacked Content

Knowledge

Students know:
  • Characteristics of multiplicative comparison situations.
  • Rate and ratio language.
  • Techniques for determining unit rates.
  • To use reasoning to find unit rates instead of a rule or using algorithms such as cross-products.

Skills

Students are able to:
  • Explain relationships between ratios and the related unit rates.
  • Use unit rates to name the amount of either quantity in terms of the other quantity flexibly.
  • Represent contextual relationships as ratios.

Understanding

Students understand that:
  • A unit rate is a ratio (a:b) of two measurements in which b is one.
  • A unit rate expresses a ratio as part-to-one or one unit of another quantity.

Vocabulary

  • Unit rate
  • Ratio
  • Rate language
  • Per
  • Quantity
  • Measures
  • Attributes

MA19.6.3

Use ratio and rate reasoning to solve mathematical and real-world problems (including but not limited to percent, measurement conversion, and equivalent ratios) using a variety of models, including tables of equivalent ratios, tape diagrams, double number lines, and equations.

Unpacked Content

Knowledge

Students know:
  • Strategies for representing contexts involving rates and ratios including. tables of equivalent ratios, changing to unit rate, tape diagrams, double number lines, equations, and plots on coordinate planes.
  • Strategies for finding equivalent ratios,
  • Strategies for using ratio reasoning to convert measurement units.
  • Strategies to recognize that a conversion factor is a fraction equal to 1 since the quantity described in the numerator and denominator is the same.
  • Strategies for converting between fractions, decimals and percents.
  • Strategies for finding the whole when given the part and percent in a mathematical and contextual situation.
  • Strategies for finding the part, given the whole and the percent in mathematical and contextual situation.
  • Strategies for finding the percent, given the whole and the part in mathematical and contextual situation.

Skills

Students are able to:
  • Represent ratio and rate situations using a variety of strategies (e.g., tables of equivalent ratios, changing to unit rate, tape diagrams, double number line diagrams, equations, and plots on coordinate planes).
  • Use ratio, rates, and multiplicative reasoning to explain connections among representations and justify solutions in various contexts, including measurement, prices and geometry.
  • Understand the multiplicative relationship between ratio comparisons in a table by writing an equation.
  • Plot ratios as ordered pairs.
  • Solve and justify solutions for rate problems including unit pricing, constant speed, measurement conversions, and situations involving percents.
  • Solve problems and justify solutions when finding the whole given a part and the percent.
  • Model using an equivalent fraction and decimal to percents.
  • Use ratio reasoning, multiplication, and division to transform and interpret measurements.

Understanding

Students understand that:
  • A unit rate is a ratio (a:b) of two measurements in which b is one.
  • A symbolic representation of relevant features of a real-world problem can provide for resolution of the problem and interpretation of the situation.
  • When computing with quantities the transformation and interpretation of the resulting unit is dependent on the particular operation performed.

Vocabulary

  • Rate
  • Ratio
  • Rate reasoning
  • Ratio reasoning
  • Transform units
  • Quantities
  • Ratio Tables
  • Double Number Line Diagram
  • Percents
  • Coordinate Plane
  • Ordered Pairs
  • Quadrant I
  • Tape Diagrams
  • Unit Rate
  • Constant Speed

MA19.6.4

Interpret and compute quotients of fractions using visual models and equations to represent problems.

Unpacked Content

Knowledge

Students know:
  • Strategies for representing fractions and operations on fractions using visual models,
  • The inverse relationship between multiplication and division (a ÷ b = c implies that a = b x c).
  • Strategies to solve mathematical and conceptual problems involving quotients of fractions.

Skills

Students are able to:
  • Represent fractions and operations on fractions using visual models.
  • Interpret quotients resulting from the division of a fraction by a fraction.
  • Accurately determine quotients of fractions by fractions using visual models/equations.
  • Justify solutions to division problems involving fractions using the inverse relationship between multiplication and division.

Understanding

Students understand that:
  • The operation of division is interpreted the same with fractions as with whole numbers.
  • The inverse relationship between the operations of multiplication and division that was true for whole numbers continues to be true for fractions.
  • The relationships between operations can be used to solve problems and justify solutions and solution paths.

Vocabulary

  • Visual fraction models
  • Dividend
  • Divisor
  • Quotient
  • Equation
  • Numerator
  • Denominator
  • Mixed number
  • Improper fraction

MA19.6.5

Fluently divide multi-digit whole numbers using a standard algorithm to solve real-world and mathematical problems.

Unpacked Content

Knowledge

Students know:
  • strategies for computing answers to division mathematical and real-world problems using the standard division algorithm.

Skills

Students are able to:
  • Strategically choose and apply appropriate strategies for dividing.
  • Accurately find quotients using the standard division algorithm.

Understanding

Students understand that:
  • Mathematical problems can be solved using a variety of strategies, models, and representations.
  • Efficient application of computation strategies is based on the numbers and operations in the problems,
  • The steps used in the standard algorithms for division can be justified by using properties of operations and understanding of place value.
  • Among all techniques and algorithms that may be chosen for accurately performing multi-digit computations, some procedures have been chosen with which all should be fluent for efficiency, communication, and use in other mathematics situations.

Vocabulary

  • Standard algorithm
  • Dividend
  • Divisor
  • Quotient

MA19.6.6

Add, subtract, multiply, and divide decimals using a standard algorithm.

Unpacked Content

Knowledge

Students know:
  • Place value conventions (i.e., a digit in one place represents 10 times as much as it would represent in the place to its right and 1/10 of what it represents in the place to its left).
  • Strategies for computing answers to complex addition, subtraction, multiplication, and division problems involving multi-digit decimals, including a standard algorithm for each operation.

Skills

Students are able to:
  • Strategically choose and apply appropriate computation strategies.
  • Accurately find sums, differences, products, and quotients using the standard algorithms for each operation.

Understanding

Students understand that:
  • Place value patterns and values continue to the right of the decimal point and allow the standard algorithm for addition and subtraction to be applied in the same manner as with whole numbers.
  • Mathematical problems can be solved using a variety of strategies, models, and representations.
  • Efficient application of computation strategies is based on the numbers and operations in the problem.
  • The steps used in the standard algorithms for the four operations can be justified by using properties of operations and understanding of place value.
  • Among all techniques and algorithms that may be chosen for accurately performing multi-digit computations, some procedures have been chosen with which all should be fluent for efficiency, communication, and use in other mathematics situations.

Vocabulary

  • Standard algorithms (addition, subtraction, multiplication, and division)
  • Quotient
  • Sum
  • Product
  • Difference
  • Tenths
  • Hundredths
  • Thousandths
  • Ten thousandths
  • Hundred thousandths

MA19.6.7

Use the distributive property to express the sum of two whole numbers with a common factor as a multiple of a sum of two whole numbers with no common factor.

Unpacked Content

Knowledge

Students know:
  • Distributive property of multiplication over addition.
  • Strategies to express the sum of two whole numbers with a common factor as a multiple of a sum of two whole numbers with no common factor by decomposing the numbers.

Skills

Students are able to:
  • Use and model the distributive property to express the sum of two whole numbers with a common factor as a multiple of a sum of two whole numbers with no common factor by decomposing the numbers.

Understanding

Students understand that:
  • Multiplication is distributive over addition.
  • Composing and decomposing numbers provides insights into relationships among numbers.
  • Quantities can be represented using a variety of equivalent expressions.

Vocabulary

  • Greatest common factor
  • Distributive property
  • Parentheses
  • Decompose

MA19.6.8

Find the greatest common factor (GCF) and least common multiple (LCM) of two or more whole numbers.

Unpacked Content

Knowledge

Students know:
  • Strategies for determining the greatest common factor of two or more numbers,
  • Strategies for determining the least common multiple of two or more numbers,
  • Strategies for determining the prime factorization of a number.

Skills

Students are able to:
  • Apply strategies for determining greatest common factors and least common multiples.
  • Apply strategies for determining the product of a number's prime factors in multiple forms which include exponential form and standard form.

Understanding

Students understand that:
  • Determining when two numbers have no common factors other than one means they are considered relatively prime.
  • Composing and decomposing numbers provides insights into relationships among numbers.

Vocabulary

  • Greatest common factor
  • Least common multiple
  • Exponential Form
  • Prime Factorization
  • Factors
  • Multiples
  • Prime
  • Relatively Prime
  • Composite

MA19.6.9

Use signed numbers to describe quantities that have opposite directions or values and to represent quantities in real-world contexts.

Unpacked Content

Knowledge

Students know:
  • notation for and meaning of positive and negative numbers, and their opposites in mathematical and real-world situations.

Skills

Students are able to:
  • Use positive, negative numbers, and their opposites to represent quantities in real-world contexts.

Understanding

Students understand that:
  • Positive and negative numbers are used together to describe quantities having opposite directions or values (temperature above/below zero, elevation above/below sea level, credits/debits, or positive/negative electrical charges).

Vocabulary

  • Positive Numbers
  • Negative Numbers
  • Opposites

MA19.6.10

Locate integers and other rational numbers on a horizontal or vertical line diagram.

Unpacked Content

Knowledge

Students know:
  • Strategies for creating number line models of rational numbers (marking off equal lengths by estimation or recursive halving).
  • Strategies for locating numbers on a number line.
  • Notation for positive and negative numbers and zero.

Skills

Students are able to:
  • Represent rational numbers and their opposites on a number line including both positive and negative quantities.
  • Explain and justify the creation of number lines and placement of rational numbers on a number line.
  • Explain the meaning of 0 in a variety of real-world contexts.

Understanding

Students understand that:
  • Representing rational numbers on number lines requires using both a distance and a direction,
  • Locating numbers on a number line provides a representation of a mathematical context which aids in visualizing ideas and solving problems.

Vocabulary

  • Integers
  • Rational numbers
  • Horizontal line diagram
  • Vertical line diagram

MA19.6.10b

Use rational numbers in real-world and mathematical situations, explaining the meaning of 0 in each situation.

MA19.6.11

Find the position of pairs of integers and other rational numbers on the coordinate plane.

Unpacked Content

Knowledge

Students know:
  • Strategies for creating coordinate graphs.
  • Strategies for finding vertical and horizontal distance on coordinate graphs.

Skills

Students are able to:
  • Graph points corresponding to ordered pairs,
  • Represent real-world and mathematical problems on a coordinate plane.
  • Interpret coordinate values of points in the context of real-world/mathematical situations.
  • Determine lengths of line segments on a coordinate plane when the line segment joins points with the same first coordinate (vertical distance) or the same second coordinate (horizontal distance).

Understanding

Students understand that:
  • A graph can be used to illustrate mathematical situations and relationships. These representations help in conceptualizing ideas and in solving problems,
  • Distances on lines parallel to the axes on a coordinate plane are the same as the related distance on the axis (number line).

Vocabulary

  • Coordinate plane
  • Quadrants
  • Coordinate values
  • ordered pairs
  • x axis
  • y axis
  • Reflection

MA19.6.11a

Identify quadrant locations of ordered pairs on the coordinate plane based on the signs of the x and y coordinates.

MA19.6.11d

Solve real-world and mathematical problems by graphing points in all four quadrants of the coordinate plane, including finding distances between points with the same first or second coordinate.

MA19.6.12

Explain the meaning of absolute value and determine the absolute value of rational numbers in real-world contexts.

Unpacked Content

Knowledge

Students know:
  • The meaning of absolute value and determine the absolute value of rational numbers in real-world contexts.

Skills

Students are able to:
  • Understand that the absolute value of a number is the distance from zero in mathematical and real-world situations.

Understanding

Students understand that:
  • the absolute value of a number is its distance from zero.

Vocabulary

  • Absolute value
  • Inequality

MA19.6.13

Compare and order rational numbers and absolute value of rational numbers with and without a number line in order to solve real-world and mathematical problems.

Unpacked Content

Knowledge

Students know:
  • How to use and interpret inequality notation with rational numbers and absolute value.
  • Strategies for comparing and ordering rational numbers and the absolute value of rational numbers with and without a number line in order to solve real-world and mathematical problems.

Skills

Students are able to:
  • Use mathematical language to communicate the relationship between verbal representations of inequalities and the related number line and algebraic models.
  • Distinguish comparisons of the absolute value of positive and negative rational numbers from statements about order.
  • Use number line models to explain absolute value concepts in order to solve real-world and mathematical problems.

Understanding

Students understand that:
  • The absolute value of a number is its distance from zero on a number line regardless of direction,
  • When using number lines to compare quantities those to the left are less than those to the right.

Vocabulary

  • Absolute Value
  • Inequalities

MA19.6.14

Write, evaluate, and compare expressions involving whole number exponents.

Unpacked Content

Knowledge

Students know:
  • Conventions of exponential notation.
  • Factorization strategies for whole numbers.

Skills

Students are able to:
  • Use factorization strategies to write equivalent expressions involving exponents.
  • Accurately find products for repeated multiplication of the same factor in evaluating exponential expressions.

Understanding

Students understand that:
  • The use of exponents is an efficient way to write numbers as repeated multiplication of the same factor and this form reveals features of the number that may not be apparent in multiplied out form, (showing the prime factorization of two numbers with exponents helps determine how many of each factor).

Vocabulary

  • Numerical expression
  • Exponent

MA19.6.15

Write, read, and evaluate expressions in which letters represent numbers in real-world contexts.

Unpacked Content

Knowledge

Students know:
  • Correct usage of mathematical symbolism to model the terms sum, term, product, factor, quotient, variable, difference, constant, and coefficient when they appear in verbally stated contexts.
  • Conventions for order of operations.
  • Convention of using juxtaposition (5A or xy) to indicate multiplication.

Skills

Students are able to:
  • Translate fluently between verbally stated situations and algebraic models of the situation.
  • Use operations (addition, subtraction, multiplication, division, and exponentiation) fluently with the conventions of parentheses and order of operations to evaluate expressions for specific values of variables in expressions.
  • Use terminology related to algebraic expressions such as sum, term, product, factor, quotient, or coefficient, to communicate the meanings of the expression and the parts of the expression.

Understanding

Students understand that:
  • The structure of mathematics allows for terminology and techniques used with numerical expressions to be used in an analogous way with algebraic expressions, (the sum of 3 and 4 is written as 3 + 4, so the sum of 3 and y is written as 3 + y).
  • When language is ambiguous about the meaning of a mathematical expression grouping, symbols and order of operations conventions are used to communicate the meaning clearly.
  • Moving fluently among representations of mathematical situations (words, numbers, symbols, etc.), as needed for a given situation, allows a user of mathematics to make sense of the situation and choose appropriate and efficient paths to solutions.

Vocabulary

  • Expressions
  • Term
  • Coefficient
  • Sum
  • Product
  • Factor
  • Quotient
  • Variable
  • Constant
  • Difference
  • Evaluate
  • Order of Operations
  • Exponent
  • Absolute Value

MA19.6.15c

Identify parts of an expression using mathematical terms such as sum, term, product, factor, quotient, and coefficient.

MA19.6.15d

Evaluate expressions (which may include absolute value and whole number exponents) with respect to order of operations.

MA19.6.16

Generate equivalent algebraic expressions using the properties of operations, including inverse, identity, commutative, associative, and distributive.

Unpacked Content

Knowledge

Students know:
  • the properties of operations, including inverse, identity, commutative, associative, and distributive and their appropriate application to be able to generate equivalent algebraic expressions.

Skills

Students are able to:
  • Accurately use the properties of operations on algebraic expressions to produce equivalent expressions useful in a problem solving context.

Understanding

Students understand that:
  • The properties of operations used with numerical expressions are valid to use with algebraic expressions and allow for alternate but still equivalent forms of expressions for use in problem solving situations.

Vocabulary

  • Properties of operations
  • Distributive property
  • Inverse property
  • Identity property
  • Commutative property
  • Associative property
  • Equivalent algebraic expressions

MA19.6.17

Determine whether two expressions are equivalent and justify the reasoning.

Unpacked Content

Knowledge

Students know:
  • The properties of operations, including inverse, identity, commutative, associative, and distributive and their appropriate application to be able to determine whether two expressions are equivalent.
  • Conventions of order of operations.

Skills

Students are able to:
  • Accurately use the properties of operations to produce equivalent forms of an algebraic expression when interpreting mathematical and contextual situations.
  • Use mathematical reasoning to communicate the relationships between equivalent algebraic expressions.

Understanding

Students understand that:
  • Manipulation of expressions via properties of the operations verifies mathematically that two expressions are equivalent.
  • Reasoning about the context from which expressions arise allows for interpretation and meaning to be placed on each of the expressions and their equivalence.

Vocabulary

  • Equivalent
  • Expressions

MA19.6.18

Determine whether a value is a solution to an equation or inequality by using substitution to conclude whether a given value makes the equation or inequality true.

Unpacked Content

Knowledge

Students know:
  • Conventions of order of operations.
  • The solution is the value of the variable that will make the equation or inequality true.
  • That using various processes to identify the value(s) that when substituted for the variable will make the equation true.

Skills

Students are able to:
  • Substitute specific values into algebraic equation or inequality and accurately perform operations of addition, subtraction, multiplication, division and exponentiation using order of operation.

Understanding

Students understand that:
  • Solving an equation or inequality means finding the value or values (if any) that make the mathematical sentence true.
  • The solution to an inequality is often a range of values rather than a specific value.

Vocabulary

  • Substitution
  • Equation
  • Inequality

MA19.6.19

Write and solve an equation in the form of x+p=q or px=q for cases in which p, q, and x are all non-negative rational numbers to solve real-world and mathematical problems.

Unpacked Content

Knowledge

Students know:
  • Correct translation between verbally stated situations and mathematical symbols and notation.
  • How to write and solve a simple equation using non-negative rational numbers to solve mathematical and real-world problems.

Skills

Students are able to:
  • Translate fluently between verbally stated situations and algebraic models of the situation.
  • Use inverse operations and properties of equality to produce solutions to equations of the forms x + p = q or px = q.
  • Use logical reasoning and properties of equality to justify solutions, reasonableness of solutions, and solution paths.

Understanding

Students understand that:
  • Variables may be unknown values that we wish to find.
  • The solution to the equation is a value for the variable which, when substituted into the original equation, results in a true mathematical statement.
  • A symbolic representation of relevant features of a real-world problem can provide for resolution of the problem and interpretation of the situation.
  • The structure of mathematics present in the properties of the operations and equality can be used to maintain equality while rearranging equations, as well as justify steps in the solutions of equations.

Vocabulary

  • Variable
  • Equation
  • Non-negative rational numbers

MA19.6.20

Write and solve inequalities in the form of $x > c$, $x < c$, $x ge c$, or $x le c$ to represent a constraint or condition in a real-world or mathematical problem.

Unpacked Content

Knowledge

Students know:
  • Correct translation between verbally stated situations and mathematical symbols and notation,
  • Many real-world situations are represented by inequalities,
  • The number line represents inequalities from various contextual and mathematical situations.

Skills

Students are able to:
  • Translate fluently among verbally stated inequality situations, algebraic models of the situation ( x > c or x

Understanding

Students understand that:
  • Inequalities have infinitely many solutions.
  • A symbolic or visual representation of relevant features of a real-world problem can provide for resolution of the problem and interpretation of the situation.

Vocabulary

  • Inequalities
  • Constraint
  • Infinitely many solutions

MA19.6.20b

Represent the solutions of inequalities on a number line and explain that the solution set may contain infinitely many solutions.

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