2.5×125×6.4×0.2.
分析:6.4=8×0.8,然后再根據(jù)乘法交換律和結(jié)合律進行簡算.
解答:解:
2.5×125×6.4×0.2,
=2.5×125×(8×0.8)×0.2,
=(2.5×8)×(125×0.8)×0.2,
=20×100×0.2,
=2000×0.2
=400.
點評:完成本題要注意分析式中數(shù)據(jù),運用合適的簡便方法計算.
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