问题
解答题
脱式计算:能简算的要简算
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答案
(1)100-36.6-63.4
=100-(36.6+63.4)
=100-100
=0
(2)0.25×13.7×0.4
=0.25×0.4×13.7
=0.1×13.7
=1.37
(3)32.7×28+7.3×28
=(32.7+7.3)×28
=40×28
=1120
(4)1.83+85+98.17+15
=(1.83+98.17)+(85+15)
=100+100
=200
(5)0.98×105
=0.98×(100+5)
=0.98×100+0.98×5
=98+4.9
=102.9
(6)6.15×9.4-42
=57.81-42
=15.81