题目内容

【题目】脱式计算,能简便的要简便。

1.82.467.23.54 3.12-(1.12+3×0.33) 1.720.92×51.28

0.45÷0.6÷0.5 38×[14.411.91)÷2.5] 4.5×4.8+5.2×4.5

【答案】31.015.04

1.519045

【解析】

1.82.467.23.54 3.12-(1.12+3×0.33) 1.720.92×51.28

=1.8+7.2-2.46+3.54 =3.12-1.12-0.99 =1.72+4.6-1.28

=9-6 =2-0.99 =6.32-1.28

=3 =1.01 =5.04

0.45÷0.6÷0.5 38×[14.411.91)÷2.5] 4.5×4.8+5.2×4.5

=0.45÷(0.6×0.5 =38×(12.5÷2.5 =4.5×(4.8+5.2

=0.45÷0.3 =38×5 =4.5×10

=1.5 =190 =45

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