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UNIT 4

UNIT 4. Review. #1. #1 Answer. W =. #2. a – 2.7 = 4.8. #2 Answer. a = 7.5. #3. The area of Yvonne’s bedroom is 180 ft ². If its length is 12 ft, what is its width?. # 3 Answer. width = 15. #4. #4 Answer. t = 60. #5. What does “inverse operation” mean?. #5 Answer.

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UNIT 4

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  1. UNIT 4 Review

  2. #1

  3. #1 Answer W =

  4. #2 a – 2.7 = 4.8

  5. #2 Answer a = 7.5

  6. #3 The area of Yvonne’s bedroom is 180 ft². If its length is 12 ft, what is its width?

  7. # 3 Answer width = 15

  8. #4

  9. #4 Answer t = 60

  10. #5 What does “inverse operation” mean?

  11. #5 Answer *To “undo” an operation *The opposite of an operation The inverse operation of addition is subtraction The inverse operation of subtraction is addition The inverse operation of multiplication is division The inverse operation of division is multiplication

  12. #6

  13. #6 Answer a =

  14. #7 What is the difference between an equation and an expression?

  15. #7 Answer An equationhas an equalsign, and an expressiondoesn’t have an equal sign

  16. #8 h + 34 = 87

  17. #8 Answer h = 53

  18. #9 t – 6.08 = 12.59

  19. #9 Answer t = 18.67

  20. #10 What is the product of 10 and 13 decreased by j when j = 40?

  21. #10 Answer (10 • 13) – 40 90

  22. #11 Solve wx – y + z; when w = 10, x = 8, y = 20, z = 15

  23. #11 Answer 75

  24. #12 Solve (order of operations)

  25. #12 Answer 8

  26. #13 Frank baked four dozen cookies for a bake sale. Each dozen cookies required three cups of chocolate chips. Write and solve an equation to find out how many cups of chocolate chips Frank bought.

  27. #13 Answer Frank bought 12 cups of chocolate chips.

  28. #14 Write as an algebraic equation: 21 less than h

  29. #14 Answer h - 21

  30. #15 Evaluate. A number x less 10 when x is 23

  31. #15 Answer x – 10 23 – 10 13

  32. #16 Evaluate – Order of Operations

  33. #16 Answer 10

  34. #17 Solve wx – y + z; when w = 15, x = 2, y = 7, z = 2

  35. #17 Answer 25

  36. #18 79 = 61 + v

  37. #18 Answer v = 18

  38. #19

  39. #19 Answer x = 40

  40. #20 w – 8.9 = 10.3

  41. #20 Answer w = 19.2

  42. #21 The sum of a number g and 43 when g is 15

  43. #21 Answer g + 43 15 + 43 58

  44. #22 Find the missing value in the table

  45. #22 Answer

  46. #23 Write an equation, then solve. A number multiplied by 3 is 36.

  47. #23 Answer 3n = 36 n = 12

  48. #24 A high school library has fiction and non-fiction books. There are 2,730 fiction books. The library has 7,680 books altogether. Write and solve an equation to find the number of non-fiction books in the high school library.

  49. #24 Answer 2730 + n = 7680 n = 4950 There are 4,950 non-fiction books in the library

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