Download In Exercises 1-20, use the associative and commutative properties of

Math 40
Prealgebra
Section 3.3 - HOMEWORK
In Exercises 1-20, use the associative and commutative properties of multiplication
to simplify the expression.
1.
10(−4x)
2.
7(−8x)
3.
(−10x)(−3)
4.
(−5x)(−8)
5.
−5(3x)
6.
9(6x)
7.
(−4x)10
8.
(−10x)(−6)
9.
(5x)3
10. (3x)3
11. (5x)10
12. (−2x)(−10)
13. −9(−7x)
14. −10(5x)
15. 6(2x)
16. 3(−10x)
17. −8(−9x)
18. 3(−3x)
19. (6x)7
20. (−8x)(−5)
In Exercises 21-44, simplify the expression.
21. 8(7x + 8)
22. −2(5x + 5)
23. 9(−2 + 10x)
24. −9(4 + 9x)
25. −(−2x + 10y − 6)
26. −(−6y + 9x − 7)
27. 2(10 + x)
28. 2(10 − 6x)
29. 3(3 + 4x)
30. 3(4 + 6x)
31. −(−5 − 7x + 2y)
32. −(4x − 8 − 7y)
33. 4(−6x + 7)
34. 6(4x + 9)
35. 4(8x − 9)
36. 10(−10x + 1)
37. −(4 − 2x − 10y)
38. −(−4x + 6 − 8y)
1
2015 Worrel
Math 40
Prealgebra
Section 3.3 - HOMEWORK
39. −(−5x + 1 + 9y)
40. −(−10 − 5x − 4y)
41. −(6x + 2 − 10y)
42. −(6x + 4 − 10y)
43. −(−3y − 4 + 4x)
44. −(−7 − 10x + 7y)
2
2015 Worrel