4/5-(3/8-1/5)递等式计算,能简便就简便.

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4/5-(3/8-1/5)递等式计算,能简便就简便.4/5-(3/8-1/5)递等式计算,能简便就简便.4/5-(3/8-1/5)递等式计算,能简便就简便.4/5-(3/8-1/5)=4/5-3/8+

4/5-(3/8-1/5)递等式计算,能简便就简便.
4/5-(3/8-1/5)递等式计算,能简便就简便.

4/5-(3/8-1/5)递等式计算,能简便就简便.
4/5-(3/8-1/5)
=4/5-3/8+1/5
=4/5+1/5-3/8
=1-3/8
=5/8