Question

50分之3*20*10分之7 （39-27分之26）*13分之1 6分之5*3分之1*5分之6 140*（5/7-1/2） 11/39*13/56*7/88

39*22*7/13*4/11 21*4/3*5/12 7/8*7/15+8/15*7/8
谢谢你 拜托一下啊

Answer 1

注：1/2 表示2分之1　下同

3/50x20x7/10
=(3x20x7)/(50x10)
=21/25
(39-26/27)x1/13
=39x1/13-26/27x1/13
=3-2/27
=79/27
5/6x1/3x6/5
=5/6x6/5x1/3
=1x1/3
=1/3
140x(5/7-1/2)
=140x5/7-140x1/2
=100-70
=40
11/39x13/56x7/88
=11/168x7/88
=1/192
39x22x7/13x4/11
=(39x7/13)x(22x4/11)
=21x8
=168
21x4/3x5/12
=28x5/12
=35/3
7/8x7/15+8/15x7/8
=7/8x(7/15+8/15)
=7/8x1
=7/8