28/29×5简便运算

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28/29×5简便运算
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28/29×5简便运算
28/29×5简便运算

28/29×5简便运算
28/29×5
=(1-1/29)×5
=1×5-1/29×5
=5-5/29
=4又24/29

= (1-1/29)×5
=1×5-1/29×5
=5-5/29
=4又24/29