0.4×4.7×2.5+(2數(shù)學公式+5.3).

解:0.4×4.7×2.5+(2+5.3)
=0.4×2.5×4.7+(2+5.3),
=1×4.7+
=4.7+,
=12
分析:根據(jù)乘法交換律,可交換4.7與2.5的位置,然后再依據(jù)分數(shù)的四則混合運算進行計算即可得到答案.
點評:此題主要用到的知識點是乘法交換律和分數(shù)的四則混合運算.
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