4/5÷(3/4-1/2)=1/5
(128+32)÷4/5=200
5/8×4/15÷3/4=2/9
34÷(2/3+3/4)=24
1÷(1/2+1/3)÷(3/4×15%)=32/3
23.4÷(1+30%)=18
72÷(1/5+1)×2/5=24
乙 20÷(1-3/5)=50 甲 50-20=30
40×(1+50%)÷(1-25%)=80
(3又1/2×6)×4/7=12
(2又1/3-1.5)×(1/3-0.2)=1/9
(18-12)÷2/5=15
1÷8/9+2.4×0.8=3.045
(10-3又1/2÷0.7)÷1/7=35
(0.25+0.025)÷5=0.055
0314除7的商比15与21的和多多少?没看懂
(2.5×60-1.4)÷50=2.972
(96÷12+17)÷5=5
(25×6-14)÷17=8
(5.6-0.25×5)÷0.125=34.8
[(1.1-0.7)×2.5+4]÷5=1
(542-84×3)×0.2=58