Decimals Questions and Answers - Form 1 Topical Mathematics

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Questions

  1. Use a calculator to find;
    1. 8754.3 x 53.84
    2. 0.8341 + 8.72
    3. Hence find:
      decimals 01
  2. Express the recurring decimal below to a fraction 5.72 and leaving your answer in the form a/b where a and b are whole numbers
  3. Evaluate:- 0.38 x 0.23 x 2.7 without using tables or a calculator
  4. Without using mathematical tables or calculator, evaluate:
    decimals 04
    Leaving the answer as a fraction in its simplest form.
  5. Find without using a calculator, the value of :
    decimals 05

Answers

  1.  
    1. 471331.512
    2. 7.273352
    3. 40.16649692
  2. Let r = 5.722222………………..
    10r = 57.22222……………….
    100r = 572.22222…………..
    100r = 572.2222……………
    10r = 57.222 ………….
    90r = 515
  3. 38 x 23 x 27 x 100 x100000
    114 x 575
    = 36 For elimination of decimals For correct answer only
  4. 84 x 132 x 35
    287 x 560
    = 99/41
  5. 12 x 0.25 – 12.4 ÷ 0.4 x 3
    ⅛ of 2.56 + 8.68
    3 – 31 x 3
    0.32 + 8.68
    -90/9
    = -10

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