Question

几道计算题！！！急！！！！！！！！！！！！！！！

5/6+1/6×6/7-6/7
39×9/14÷13/14÷18
9/20×1/2+19/20÷2
(1//4+1/3÷1/2)÷1/5
[6/7-(1-1/7)]÷6/19
要过程！

Answer 1

5/6+1/6×6/7-6/7=5/24
39×9/14÷13/14÷18=1.5
9/20×1/2+19/20÷2=7/10
(1//4+1/3÷1/2)÷1/5=55/12
[6/7-(1-1/7)]÷6/19=0

追问

有过程没？

追答

。。。。。。。。。。。。。。。。。。不是吧ok
5/6+1/6×6/7-6/7=5/6+1/7-6/7=41/42-6/7=5/24
39×9/14÷13/14÷18=351/14÷13/14=1.5
9/20×1/2+19/20÷2=9/40+19/40=7/10
(1//4+1/3÷1/2)÷1/5=（1/4+2/3）÷1/5=11/12÷1/5=55/12
[6/7-(1-1/7)]÷6/19=(6/7-6/7)÷6/19=0÷6/19=0

Answer 2

5/42

Answer 3

额，5/6+1/6×6/7-6/7
=5/6+1/7-6/7
=41/42-6/7
=5/42

39×9/14÷13/14÷18
=39×9/14×14/13×1/18
（中间有约分）
=3/2

9/20×1/2+19/20÷2
=9/20×1/2+19/20×1/2
=（9/20+19/20）×1/2
=28/20×1/2
=7/10=0.7

（1/4+1/3÷1/2）÷1/5
=（1/4+1/3×2）×5
=（1/4+2/3）×5
=（3/12+8/12）×5
=11/12×5
=55/12

[6/7-(1-1/7)]÷6/19
=[6/7-6/7]×19/6
=0×19/6
=0

应该是这样吧。看完之后自己再稍微算一下，有可能错了