Find the sum by suitable rearrangement: (a) `297xx17+297xx3` (b) `54279xx92+8xx54279` (c) `81265xx169-81265xx69` (d) `3845xx5xx782+769xx25xx218`

Explanation

(a)`297*17+297*3`

`=297(17+3)= 297*20`

`=5940` answer

(b)`54279*92 + 8*54279`

`=54279(92+8)= 54279*100`

`=5427900`

(c)`81265*169- 81265*69`

`=81265(169-69)= 81265*100`

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