FIND THE SUM BY SUITABLE REARRANGEMENT WORKSHEET

Problem 1 :

Find the following sums by adding them in the most convenient order:

a) 3 + 6 + 7

b) 19 + 8 + 2

c) 3 + 6 + 7 + 4

d) 21 + 98 + 19

e) 45 + 14 + 26

f) 98 + 57 + 102

g) 107 + 14 + 23

h) 28 + 13 + 12 + 37

Solution

Problem 2 :

Find the sum by suitable rearrangement:

(a) 837 + 208 + 363

(b) 1962 + 453 + 1538 + 647

Solution

Problem 3 :

Study the pattern

1 x 8 + 1 = 9

12 x 8 + 2 = 98

Next step ?

Solution

Problem 4 :

Find the value of the following.

(a) 297 × 17 + 297 × 3

(b) 54279 × 92 + 8 × 54279

(c) 81265 × 169 – 81265 × 69

(d) 3845 × 5 × 782 + 769 × 25 × 218

Solution

Answer Key

1)  a) 16     b)  29   c)  20     d)  138   e)  85   f)  257

g)  153    h)  90

2)  i)  1408    ii)  4600

3)  987

4) a)  8910     b)  5427900    c)  8126500    d)  19225000

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