Answers

2015-06-05T17:35:29+05:30
I)87*32 
by rounding off each number to nearest tens
90*30 =2700
ii)311*113
by rounding off each number to nearest tens
310*110=34100
iii)3239*28
by rounding off each number to nearest tens
3240*30=97200
iv)1385*789
by rounding off each number to nearest tens
1390*790 =1098100
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2015-06-05T17:38:33+05:30
(a)2700 
(B)34100
(C)97200
(D)1098100.
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