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Answer» ★ 103×107= (100+3)(100+7)= 100 ² + (3+7)(100) +3 × 7= 10000 + 1000 + 21 = 11021___________________________________ ★ 95×96= (90+5) (90+6)= 90 ²+ ( 5+6 )( 90) + 5 × 6= 8100 + 990 + 30 = 9120___________________________________ ★ 104 × 96= (100 + 4 ) + (100 - 4 )= (100 ² ) - 4²= 10000 - 16 = 9984_______________________________ |
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