3.8×0.05=5÷0.25=1.25×0.08=0.1×0.1÷0.1×0.1=
9-7.942=22.4÷4=0.38-0.38÷2=0.75+0.25×4=

解:

3.8×0.05=0.195÷0.25=201.25×0.08=0.10.1×0.1÷0.1×0.1=0.01
9-7.942=1.05822.4÷4=5.60.38-0.38÷2=0.190.75+0.25×4=1.75

分析:根據(jù)小數(shù)加減乘除的計算法則進行計算,或者根據(jù)小數(shù)的四則混合運算順序進行計算即可.
點評:這類型的題目屬于基本的計算,計算時要細心,注意小數(shù)的位數(shù),靈活運用一些定律進行簡便計算.
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