问题
解答题
脱式计算,能简算的要简算
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答案
(1)4.57+3.34÷0.2
=4.57+16.7,
=21.27;
(2)1.68÷0.25÷0.4
=1.68÷(0.25×0.4),
=1.68÷0.1,
=16.8;
(3)2.5×0.7+7.5×0.7
=(2.5+7.5)×0.7,
=10×0.7,
=7;
(4)0.125×0.32×0.25
=(0.125×0.8)×(0.4×0.25)
=0.1×0.1,
=0.01.