Learning Goal
Part of: Apply and extend previous understandings of arithmetic to algebraic expressions — 2 of 4 cluster items
Write, read, and evaluate expressions in which letters stand for numbers
**6.EE.A.2** Write, read, and evaluate expressions in which letters stand for numbers.
a. Write expressions that record operations with numbers and with letters standing for numbers. For example, express the calculation "Subtract y from 5" as 5 - y.
b. Identify parts of an expression using mathematical terms (sum, term, product, factor, quotient, coefficient); view one or more parts of an expression as a single entity. For example, describe the expression 2(8 + 7) as a product of two factors; view (8 + 7) as both a single entity and a sum of two terms.
c. Evaluate expressions at specific values of their variables. Include expressions that arise from formulas used in real-world problems. Perform arithmetic operations, including those involving whole-number exponents, in the conventional order when there are no parentheses to specify a particular order (Order of Operations). For example, use the formulas V = s^3 and A = 6s^2 to find the volume and surface area of a cube with sides of length s = 1/2.
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6.EE.A.2 Write, read, and evaluate expressions in which letters stand for numbers.
a. Write expressions that record operations with numbers and with letters standing for numbers. For example, express the calculation "Subtract y from 5" as 5 - y.
b. Identify parts of an expression using mathematical terms (sum, term, product, factor, quotient, coefficient); view one or more parts of an expression as a single entity. For example, describe the expression 2(8 + 7) as a product of two factors; view (8 + 7) as both a single entity and a sum of two terms.
c. Evaluate expressions at specific values of their variables. Include expressions that arise from formulas used in real-world problems. Perform arithmetic operations, including those involving whole-number exponents, in the conventional order when there are no parentheses to specify a particular order (Order of Operations). For example, use the formulas V = s^3 and A = 6s^2 to find the volume and surface area of a cube with sides of length s = 1/2.
What you'll learn
- Translate verbal descriptions into algebraic expressions using variables, and read algebraic expressions aloud or in words
- Identify parts of an algebraic expression using precise mathematical terms: sum, term, product, factor, quotient, coefficient
- View a sub-expression as a single entity at one level while recognizing its internal structure at another level
- Evaluate algebraic expressions by substituting specific values for variables, using parentheses around substituted values and applying the conventional order of operations
- Apply formulas from real-world contexts by substituting given values -- including fractions -- and evaluating the result
Slides
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Slide Video
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Task-sets
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