Standards - Mathematics

Calculate unit rates of length, area, and other quantities measured in like or different units that include ratios or fractions.

Represent a relationship between two quantities and determine whether the two quantities are related proportionally.

Use equivalent ratios displayed in a table or in a graph of the relationship in the coordinate plane to determine whether a relationship between two quantities is proportional.

Identify the constant of proportionality (unit rate) and express the proportional relationship using multiple representations including tables, graphs, equations, diagrams, and verbal descriptions.

Explain in context the meaning of a point (x,y) on the graph of a proportional relationship, with special attention to the points (0,0) and (1, r) where r is the unit rate.

Solve multi-step percent problems in context using proportional reasoning, including simple interest, tax, gratuities, commissions, fees, markups and markdowns, percent increase, and percent decrease.

Apply and extend knowledge of operations of whole numbers, fractions, and decimals to add, subtract, multiply, and divide rational numbers including integers, signed fractions, and decimals.

Identify and explain situations where the sum of opposite quantities is 0 and opposite quantities are defined as additive inverses.

Interpret the sum of two or more rational numbers, by using a number line and in real-world contexts.

Explain subtraction of rational numbers as addition of additive inverses.

Use a number line to demonstrate that the distance between two rational numbers on the number line is the absolute value of their difference, and apply this principle in real-world contexts.

Extend strategies of multiplication to rational numbers to develop rules for multiplying signed numbers, showing that the properties of the operations are preserved.

Divide integers and explain that division by zero is undefined. Interpret the quotient of integers (with a non- zero divisor) as a rational number.

Convert a rational number to a decimal using long division, explaining that the decimal form of a rational number terminates or eventually repeats.

Solve real-world and mathematical problems involving the four operations of rational numbers, including complex fractions. Apply properties of operations as strategies where applicable.

Apply properties of operations as strategies to add, subtract, factor, and expand linear expressions with rational coefficients.

Generate expressions in equivalent forms based on context and explain how the quantities are related.

Solve multi-step real-world and mathematical problems involving rational numbers (integers, signed fractions and decimals), converting between forms as needed. Assess the reasonableness of answers using mental computation and estimation strategies.

Use variables to represent quantities in real-world or mathematical problems and construct algebraic expressions, equations, and inequalities to solve problems by reasoning about the quantities.

Solve word problems leading to equations of the form $px + q = r$ and $p(x + q) = r$, where p, q, and r are specific rational numbers. Solve equations of these forms fluently. Compare an algebraic solution to an arithmetic solution, identifying the sequence of the operations used in each approach.

Solve word problems leading to inequalities of the form $px + q > r$ or $px + q < r$, where $p$, $q$, and $r$ are specific rational numbers. Graph the solution set of the inequality, and interpret it in the context of the problem.

Examine a sample of a population to generalize information about the population.

Differentiate between a sample and a population.

Compare sampling techniques to determine whether a sample is random and thus representative of a population, explaining that random sampling tends to produce representative samples and support valid inferences.

Determine whether conclusions and generalizations can be made about a population based on a sample.

Use data from a random sample to draw inferences about a population with an unknown characteristic of interest, generating multiple samples to gauge variation and making predictions or conclusions about the population.

Informally explain situations in which statistical bias may exist.

Informally assess the degree of visual overlap of two numerical data distributions with similar variabilities, measuring the difference between the centers by expressing it as a multiple of a measure of variability.

Make informal comparative inferences about two populations using measures of center and variability and/or mean absolute deviation in context.

Use a number from 0 to 1 to represent the probability of a chance event occurring, explaining that larger numbers indicate greater likelihood of the event occurring, while a number near zero indicates an unlikely event.

Define and develop a probability model, including models that may or may not be uniform, where uniform models assign equal probability to all outcomes and non-uniform models involve events that are not equally likely.

Collect and use data to predict probabilities of events.

Compare probabilities from a model to observed frequencies, explaining possible sources of discrepancy.

Approximate the probability of an event using data generated by a simulation (experimental probability) and compare it to the theoretical probability.

Observe the relative frequency of an event over the long run, using simulation or technology, and use those results to predict approximate relative frequency.