3/4÷(3/5-3/5x1/3)
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①3/8÷(1-5/12-1/12)
【解析】:
原式
=3/8÷(5/12-1/12)
=3/8÷1/3
=3/8×3
=9/8
②(2/5+3/7)×3.5
【解析】:
原式
=2/5×3.5+3/7×3.5
=7/5+3/2
=14/10+15/10
=29/10
=2.9
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第1个回答 推荐于2020-05-23
3/8÷(1-5/12-1/12)
=3/8÷(7/12-1/12)
=3/8÷1/2
=3/4
(2/5+3/7)ⅹ3.5
=2/5ⅹ3.5+3/7ⅹ3.5
=1.4+1.5
=2.9
3/4÷(3/5-3/5x1/3)
=3/4÷(3/5-1/5)
=3/4÷2/5
=15/8本回答被网友采纳
=3/8÷(7/12-1/12)
=3/8÷1/2
=3/4
(2/5+3/7)ⅹ3.5
=2/5ⅹ3.5+3/7ⅹ3.5
=1.4+1.5
=2.9
3/4÷(3/5-3/5x1/3)
=3/4÷(3/5-1/5)
=3/4÷2/5
=15/8本回答被网友采纳
第2个回答 2019-12-20
解题过程和结果请打开图
第3个回答 2019-12-20
3/8÷(1-5/12-1/12)
=3/8÷(7/12-1/12)
=3/8÷6/12
=3/8×12/6
=3/4
(2/5+3/7)×3.5
=(14/35+15/35)×3.5
=29/35×3.5
=2.9
=3/8÷(7/12-1/12)
=3/8÷6/12
=3/8×12/6
=3/4
(2/5+3/7)×3.5
=(14/35+15/35)×3.5
=29/35×3.5
=2.9
第4个回答 2019-12-20