Find the sum by suitable rearrangement:
(a) 837 + 208 + 363 (b) 1962 + 453 + 1538 + 647
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Answer:
(a) 837+208+363
=(837+363)+208
=1200+208
=1408
(b) 1962+453+1538+647
= (1962+1538) + (453+647)
= 4600
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