(5/12-3/5)-(7/12-2/5)简算不用负数解决
问题描述：
(5/12-3/5)-(7/12-2/5)简算
不用负数解决
答
不用负数解决
(5/12-3/5)-(7/12-2/5)
=-(7/12-5/12+3/5-2/5)
=-(1/6+1/5)
=-11/30
答
(5/12-3/5)-(7/12-2/5)
=5/12-3/5-7/12+2/5
=5/12-7/12-(3/5-2/5)
=-1/6-1/5
=-11/30
不能不是负数,因为算出来结果是负数哦
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