## 6.EE.2

6.EE.2 – Write, read, and evaluate expressions in which letters stand for numbers.

- 2.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.*
- 2.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.*
- 2.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 = 6 s^{2} to find the volume and surface area of a cube with sides of length s = 1/2.

**Internet Resources (Videos, Websites, etc.)**

Illustrative Mathematics Project

- Illustrations

Khan Academy

Learn Zillion

- Combine parts of an expression: using the associative property
- Simplify multiplication and division expressions: combining like terms
- Simplify addition and subtraction expressions: combining like terms

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