8/5÷6×5/12=8/5×5/12×1/6=2/3×1/6=1/9
8÷16/3－3/4=8×3/16-3/4=3/2-3/4=3/4
3/8×2/3×4/9=1/9
5/6÷(4/7÷9/14)=5/6÷8/9=15/16
3/7－3/7×5/12=3/7×（1-5/12）=3/7×7/12=1/4
5/12÷1/4÷6×5/6=5/3÷6×5/6=5/18×5/6=25/108
45×5/44=（44+1）×5/44=44×5/44+1×5/44=5+5/44=5又5/44
98×98/99=（99-1）×98/99=99×98/99-1×98/99=98-98/99=97又1/99
1÷7/9×1÷7/9=9/7÷7/9=81/49=1又32/49
7/36÷11/12÷5/33=7/33÷5/33=7/5=1又2/5
23/25÷(2/5+3/4)=23/25÷23/20=4/5
3/5×8/7+3/7×6/5=3/5×8/7+6/7×3/5=3/5×（8/7+6/7）=3/5×2=6/5=1又1/5
3/5－5/9×4/5=3/5-4/9=7/45
(1/4－1/4×1/2)÷1/4=（1/4-1/8)÷1/4=1/4÷1/4-1/8÷1/4=1-1/2=1/2
5/8×1/15+3/8÷15=5/8×1/15+3/8×1/15=（5/8+3/8）×1/15=1×1/15=1/15
(1/3+1/4+1/5)×60=1/3×60+1/4×60+1/5×60=20+15+12=47
(3/5+1/4)÷(2/5×1/4)=17/20÷1/10=17/2=8又1/2
1/13×(13/24+13/12)=1/13×13/24+1/13×13/12=1/24+1/12=1/8
(8/15－9/20)÷(3/4+1/8)=1/12÷7/8=2/21
13×4/5+3÷5/4－4/5=13×4/5+3×4/5－4/5=（13+3-1）×4/5=15×4/5=12
3/4×98+3/4×2=3/4×（98+2）=3/4×100=75
76×3/74=（74+2）×3/74=74×3/74+2×3/74=3+3/37=3又3/37
11÷11/12×5/6=12×5/6=10
