Question

Find the sum by suitable rearrangement : (i) 2972 + 473 + 1528 + 527 (ii) 864 + 435 + 765 + 336
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Answer 1

Step-by-step explanation:

837+208+363

=(837+363)+208

=1200+208

=1408

(b) 1962+453+1538+647

= (1962+1538) + (453+647)

= 4600

Answer 2

Answer:

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In this method of suitable rearrangement the unit digits that should be grouped and added first are (1+9) ,(2+8) ,(3+7) ,(4+6) ,(5+5) gives sum as 10. These unit digited numbers should be added first and then the other numbers should be added.