Page 70 - Math Course 2 (Book 1)

Commutative and Associative Properties

Simplify each expression.
7. 2x + 5y + 9x 8. a + 9b + 6a

9. 2p + 3q + 5p + 2q 10. r + 3s + 5r + s

2
2
2
2
11. 5m + 3m + m 12. 6k + 6k + k + 9k

13. 2a + 3(4 + a)

Write an algebraic expression for each verbal expression. Then simplify, indicating the properties used.

14. three times the sum of a and b increased by a

15. twice the sum of p and q increased by twice the sum of 2p and 3q

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