Mathematics
Grade5
Easy

Question

Estimate the sum of 45 2 over 19 and 83 7 over 13 by replacing each fraction with 0,1 half, or 1.

  1. 128 1 half
  2. 128
  3. 129
  4. 127

hintHint:

2 over 19 space equals 0.10526.. space w h i c h space i s space n e a r space t o space 0 space a n d space c a n space b e space r o u n d e d space o f f space t o space 0.
7 over 13 space equals 0.5384615385 space w h i c h space i s space n e a r space t o space 0.5 space. S o space w e space r e p l a c e space i t space w i t h space 1 half.
S o space w e space g e t space left parenthesis 45 plus 0 right parenthesis plus left parenthesis 83 plus 1 half right parenthesis

The correct answer is: 128 1 half


    45 2 over 19 plus 83 7 over 13 equals 45 plus 83 1 half equals 128 1 half

    Round off the fraction part of the mixed fraction to 0,1 or 1 half and add it with the whole number part of the mixed fraction.

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