用简便方法计算下面各题.(脱式计算)5分之2乘4乘4分之3 5分之4乘9分之7乘8分之5 七分之5乘16乘5分之2

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2025-03-23 04:53:50
推荐回答(1个)
回答1:

2/5*4*3/4
=2/5*3
=6/5
=1又1/5

4/5*7/9*5/8
=4/5*5/8*7/9
=1/2*7/9
=7/18

5/7*16*2/5
=5/7*2/5*16
=1/7*16*2
=32/7
=4又4/7