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You should use pen and paper (not a calculator) to do the first ten calculations.

  1. 1. 73 + 48 =

    1. 111
    2. 121
    3. 221
    4. 211

  2. 4132 + 6189 =

    1. 10 321
    2. 11 311
    3. 10 221
    4. 11 121

  3. 6147 - 5827 =

    1. 1320
    2. 220
    3. 320
    4. 1220

  4. 33 x 74 =

    1. 2442
    2. 2342
    3. 2412
    4. 2312

  5. 6143 x 327 =

    1. 2 008 761
    2. 2 118 761
    3. 2 019 761
    4. 2 019 761

  6. 76 ÷ 3 =

    1. 24 1/3
    2. 24.3
    3. 25.4
    4. 25 1/3

  7. 693 ÷ 7 =

    1. 99
    2. 98 6/7
    3. 97.9
    4. 97.7

  8. 1 1/2 + 2 1/3 =

    1. 3 2/5
    2. 3 5/6
    3. 4 1/6
    4. 3 1/6

  9. 4 1/6 x 2 2/5 =

    1. 10
    2. 10 1/6
    3. 8 1/15
    4. 8 2/30

  10. 10 6.42 x 1.7 =

    1. 10.914
    2. 109.14
    3. 1.0914
    4. 110.14

  11. Specifications for a component states that its length is to be 100 mm + 0.5 mm. Five components are measured after production for quality control purposes. The results are:

    Component 1      100.2 mm
    Component 2      99.2 mm
    Component 3      100.7 mm
    Component 4      99.7 mm
    Component 5      100.0 mm

    Which components would pass quality control?

    1. 1, 2, 3
    2. 2, 3, 4
    3. 3, 4, 5
    4. 4, 5, 1

  12. Bill needs to make a “rough” estimate of the following calculation.

    69.432 x 1.137²
    128.43

    Which one of the following calculations should he use to work out his estimate?

    1. 69.43 x 1.14²
      128.43

    2. 70 x 1.1²
      128.4

    3. 70 x 1²
      100

    4. 69 x 1.1²
      130

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