(3/4—2/3)÷1/5(简便计算)(过程也要有) (3/8+2/17)×8+1/17(简便计
1个回答
(3/4—2/3)÷1/5
=[(9-8)/12]X5
=5/12
(3/8+2/17)×8+1/17
=3+16/17+1/17
=3+1
=4
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