Learning Resource Type

Classroom Resource

Write Expressions Where Letters Stand for Numbers

Subject Area

Mathematics

Grade(s)

6

Overview

The focus of this video lesson is writing expressions to represent situations. Students write expressions to represent operations with numbers and with letters standing in for numbers. Students can also choose to represent expressions with tape diagrams (MP5).

    Mathematics (2019) Grade(s): 6

    MA19.6.15

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

    Unpacked Content

    UP:MA19.6.15

    Vocabulary

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

    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.
    Link to Resource

    CR Resource Type

    Audio/Video

    Resource Provider

    PBS
    Accessibility
    License

    License Type

    PD
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