1.1 Review Worksheet, Part 1 (continued)
Use mental math to find each value. 20. 9% sales tax on a $150 purchase
21. cost of 5 items at $1.96 each
Classify each statement as sometimes, always, or never true. Give examples or properties to support your answer. 22. a − ( b − c ) = a − b + c 23. ≠ ≠ ab a b 1 0 for 0 and 0
=
ab
1.1.3 Square Roots Estimate to the nearest tenth . 24. 60
27. 99
25. − 15
26. 47
Simplify each expression. 28. 162
30. 50 9
1 121
29. −
31. − ⋅ 2 10 8
32. 288 8
34. 2 126 14
33.
35. − 189
⋅ 85 5
Simplify by rationalizing each denominator. 36. 2 3 37. 3 27 2 6
18 6
39. 11
38. −
5 132
Add or subtract. 40. − 4 3 9 3
41.
42.
43.
+ 112 63
− 8 15 2
+ 12 7 27
38
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