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Addresses the following 1st Grade standard from the Common Core State Standards for Mathematics:
Expressions and Equations 6.EE - Apply and extend previous understandings of arithmetic to algebraic expressions
2. Write, read, and evaluate expressions in which letters stand for numbers.
a. Write expressions that record operations with numbers and withletters standing for numbers.
3. Apply the properties of operations to generate equivalent expressions.
4. Identify when two expressions are equivalent (i.e., when the two expressions name the same number regardless of which value is substituted into them). For example, the expressions y + y + y and 3y are equivalent because they name the same number regardless of which number y stands for.

Write an equivalent expression for each the following:

x + x + x + x








3m + 3n


2(q + r)


3c + 2


a + a + b + b + b



t + t + t + t

(i + j) + (i + j) + (i + j)


w + w + w + w + w + 10

(x + 2) + (x + 2)


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