第1个回答 2016-12-17
1。3/4×4/9=
2.(5/8+4/5)×(6/8-8/9)=
3.(3/4÷2/9)×(2/9+3/6-6/9)=
4.5/9×[(2/8+5/6)÷(1/2-3/5)]=
5.4/9×(2/3+4/9)=
6.1/8×(3/4-2/9×4/5)=
7.(3/4+3/2)×2/9=
8.9/8÷2/4×(2/7+1/4)=
9.4/7×3/4=
10.(2/8×1/9-2/3)×6/5=
11.9/8-3/7×3/5÷2/9=
12.(2/9+3/9)×(2/6÷2/5)=
13.(2/9÷6/9)×(1-3/8×2/3)=
14.2/3×[(2/7+3/5)-(1/2÷3/4×3/8)]=
15.4/6×(1/2-3/4×6/7)=
16.4/9+1/3×4/7=
17.2/5×(1+3/6×2/8)=
18.(2/7+4/6×2/9)×5/8=
19.2/5÷4/6×2/5=
20.[3/7+(2/3-4/5÷2/5)]×(3/7+1/8÷3/9)=