計(jì)算下列各題.(前三題用簡便算法)
6.33×101-6.33 3.7×28+3.7×2 25×125×4×0.08
10×0.2÷2.5 12.5×8÷2.5 (7.7+1.4)÷0.7.
分析:①②運(yùn)用乘法的分配律進(jìn)行計(jì)算即可.
③運(yùn)用乘法的結(jié)合律,交換律進(jìn)行計(jì)算.
④⑤⑥運(yùn)用小數(shù)的加減,乘除法的計(jì)算法則進(jìn)行計(jì)算即可.
解答:解: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,
=40;

⑥(7.7+1.4)÷0.7,
=9.1÷0.7,
=13;
點(diǎn)評:完成本題要注意分析式中數(shù)據(jù),運(yùn)用合適的簡便方法計(jì)算.
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計(jì)算下列各題.(前三題用簡便算法)
6.33×101-6.333.7×28+3.7×225×125×4×0.08
10×0.2÷2.512.5×8÷2.5(7.7+1.4)÷0.7.

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