问题
解答题
计算下列各题.(前三题用简便算法)
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答案
①6.33×101-6.33,
=6.33×(101-1),
=6.33×100,
=633;
②3.7×28+3.7×2,
=3.7×(28+2),
=3.7×30,
=111;
③25×125×4×0.08,
=(25×4)×(125×0.08),
=100×10,
=1000;
④10×0.2÷2.5,
=2÷2.5,
=0.8;
⑤12.5×8÷2.5,
=100÷2.5,
=400;
⑥(7.7+1.4)÷0.7,
=9.1÷0.7,
=13;