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Grade 8 · Decimal Fractions
Squares, Cubes & Roots of Decimals
MEMORANDUM
Name: 
Class: 
Date: 
Mark
  / 12

Answer all questions. Show all your working — marks are awarded for method as well as the final answer. Teacher copy: accept any correct equivalent method.

  1. 1
    0,42
    (1)
    4 × 4 = 16, 2 dp → 0,16✓ (1)
  2. 2
    0,52
    (1)
    0,25✓ (1)
  3. 3
    1,22
    (1)
    12 × 12 = 144, 2 dp → 1,44✓ (1)
  4. 4
    0,23
    (1)
    2 × 2 × 2 = 8, 3 dp → 0,008✓ (1)
  5. 5
    0,13
    (1)
    0,001✓ (1)
  6. 6
    √0,09
    (1)
    9/100 → 3/10 = 0,3✓ (1)
  7. 7
    √0,64
    (1)
    64/100 → 8/10 = 0,8✓ (1)
  8. 8
    √1,44
    (2)
    144/100 → 12/10 = 1,2✓✓ (2)
  9. 9
    ∛0,027
    (2)
    27/(1 000) → 3/10 = 0,3✓✓ (2)
  10. 10
    ∛0,001
    (1)
    1/(1 000) → 1/10 = 0,1✓ (1)
TOTAL: 12 marks
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