1.

Find the sum by suitable rearrangement: (a) `837+208+363` (b) `1962+453+1538+647`

Answer» (a) `837+208+363`
= `(837+363)+ 208`
`= 1200+208`
`=1408` answer
(b)`1962+453+1538+647`
`= (1962+1538)+ (453+ 647)`
`= 3500+1100`
`=4600`answer


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