3/8+3/8+7/5-3/8怎么简便运算3/8+3/8+7/5-3/8,我弄错了。是3/5+3/8+7/5-3/8

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3/8+3/8+7/5-3/8怎么简便运算3/8+3/8+7/5-3/8,我弄错了。是3/5+3/8+7/5-3/8

3/8+3/8+7/5-3/8怎么简便运算3/8+3/8+7/5-3/8,我弄错了。是3/5+3/8+7/5-3/8
3/8+3/8+7/5-3/8怎么简便运算
3/8+3/8+7/5-3/8,我弄错了。是3/5+3/8+7/5-3/8

3/8+3/8+7/5-3/8怎么简便运算3/8+3/8+7/5-3/8,我弄错了。是3/5+3/8+7/5-3/8
(3/5+7/5)+(3/8-3/8)=2

3/8+3/8+7/5-3/8=3/8+7/5+(3/8-3/8)=3/8+7/5=15/40+56/40=(15+56)/40=71/40

3/8+3/8+7/5-3/8
=(3/8-3/8)+3/8+7/5
=3/8+7/5
=15/40+56/40
=71/40
=1又40分之31