9.3除以(3.1乘5) 0.8乘[13减(3.1 - 知识问答

9.3除以(3.1乘5) 0.8乘[13减(3.12加5.28）] 8.1除以4.5简便运算

1个回答

简便运算：
9.3除以(3.1乘5)
=9.3/(3.1*5)
=3/5
=0.6
0.8乘[13减(3.12加5.28）]
=0.8*[13-(3.12+5.28)]
=0.8*[13-8.4]
=0.8*4.6
=4.6-0.92
=3.68
8.1除以4.5
=8.1/4.5
=81/9
=9

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