8.1÷0.3=3.2÷0.01=6.8×0.5=7.2÷0.25÷4=
4.6×9+4.6=4.7×0.01=1.25×4.3×8=8.6-1.48-0.52=

解:(1)8.1÷0.3=27(2)3.2÷0.01=320(3)6.8×0.5=3.4(4)7.2÷0.25÷4=7.2
(5)4.6×9+4.6=46(6)4.7×0.01=0.047(7)1.25×4.3×8=43(8)8.6-1.48-0.52=6.6

分析:(1)根據(jù)小數(shù)除法的計算方法進(jìn)行計算,
(2)(6)根據(jù)小數(shù)點移動變化的規(guī)律進(jìn)行計算,
(3)根據(jù)小數(shù)乘法的計算方法進(jìn)行計算,
(4)根據(jù)一個數(shù)連續(xù)除以兩個數(shù)等于除以這兩個數(shù)的積,進(jìn)行計算,
(5)根據(jù)乘法分配律進(jìn)行計算,
(7)根據(jù)乘法交換律進(jìn)行計算,
(8)根據(jù)一個連續(xù)減兩個數(shù),等于減去這兩個數(shù)的和,進(jìn)行計算.
點評:本題考查了學(xué)生在計算中靈活運用簡便算法使計算簡便的能力.
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