Answer Key: Self-Test C-1.2

  1. Add the following sets of numbers:
    1. 10
    2. 15
    3. -8
    4. -12
    5. -20
    6. -73
    7. -1
    8. 12
  2. Complete the following subtraction problems:
    1. 15
    2. 80
    3. -9
    4. -15
  3. Complete the following multiplication problems:
    1. 36
    2. -108
    3. 32
    4. -77
    5. 224
  4. Complete the following division problems:
    1. -7
    2. 1.2857
    3. -7.08
    4. -20.5
  5. Solve each problem, using f = 8, g = 9 and h = 10.
    1. a = 18
    2. y = 91
    3. b = 1
    4. m = 3.51
    5. c = 720
    6. a = 81
    7. d = 7.2
    8. n = 6
    9. x = 83
    10. P = 518.4
  6. Solve the following for a and check by substituting the answer into the original equation:
    1. 6
    2. 28
    3. 4.5
  7. Solve the following for b and check:
    1. 6.0714
    2. 45
    3. 3.333
    4. 5
  8. Solve the following proportions for a and check:
    1. 3
    2. 13.5
    3. 5
  9. A fan turning at 1,500 RPM is moving 2,500 CFM of air. If the CFM is to be increased to 3,000, what must the new fan speed be?
    1. 1,800 RPM

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Block C: Routine Trade Activities and Electrical Concepts Copyright © 2026 by Skilled Trades BC, TRU Open Press is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License, except where otherwise noted.

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