1.10.01乘以7.8怎样巧算 2.28.9乘以4除以289怎样巧算

richlew18132022-10-04 11:39:541条回答

1.10.01乘以7.8怎样巧算 2.28.9乘以4除以289怎样巧算
( )乘以( )=0.4

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VC5546 共回答了19个问题 | 采纳率84.2%
10.01×7.8
=10×7.8+0.01×7.8
=78+0.078
=78.078
28.9×4÷289
=28.9÷289×4
=0.1×4
=0.4
﹙4﹚×﹙0.1﹚=0.4
1年前

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