（3/5+7/8）*40 11/3-5/7*14/15 5/6/（4/7/9/14） （5/8-1/10）*（5/9+1

(3/5+7/8)x40
=3/5x40+7/8x40
=24+35
=59
11/3-5/7x14/15
=11/3-2/3
=3
5/6÷(4/7÷9/14)
=5/6÷(4/7x14/9)
=5/6÷8/9
=5/6x9/8
=15/16
(5/8-1/10)x(5/9+1/3)
=21/40x8/9
=7/15
1/5÷(1-1/2-1/3)
=1/5÷1/6
=6/5
(3/4+1/2)÷5/8
=5/4x8/5
=2
23/14x27-9/14÷1/27
=27x(23/14-9/14)
=27x1
=27
24x(3/4-7/12)
=24x3/4-24x7/12
=18-14
=4
(2/3-4/9x3/8)÷7/16
=(2/3-1/6)x16/7
=1/2x16/7
=8/7
20÷5/9+3/8x4
=20x9/5+3/2
=36+3/2
=75/2