1.30×(1/5+1/3) 2.2/3×5/7+2/3×2/7 3.3/4×1/9+1/4÷9 4.5-(6/7÷3/
(1/4-1/6)x12 1÷2分之1÷1 (0.18+0.9)÷9 3/7÷1/3 1-1÷7 3/7+5/13-3/
(简算) (7/15-1/3)÷(1/3+1/5) (3/4+1/2)÷5/8 2/13+3/4÷9/10+1/6 [3
3-8/9×6/5÷32/3 (1-1/4×8/9)×9/7 (5/6+1/3)÷(3/4-2/3) 3/4÷(1/2-
12×3/8÷3/4 (1/4+2/9)×72 7/15+8/15×15 3-2/3÷4/5-1/6 (1/3+1/2)
9÷1×8+7-2×3+4-5
(2/3-4/9×3/8)÷7/16 9/14×49-9/14÷1/49 (3/4+1/2)÷5/8 2/13+3/4÷
10÷9分之5+6分之1×4 6分之1×3分之2÷(5分之4-15分之8) 7分之9÷5反之11+9反之2×11反之5
要简便算法,1:8/9×(9+3/4)-2/3 2:7/8÷2/3+7/8×1/2 3:4-2/5÷8/15-1/4
2/3×5/7+2/3×2/7(简便计算) 3/4×1/9+1/4÷9(简便计算) 5-(6/7÷
在1:(即使采纳)四、计算题.1/7÷7+7÷1/7 6-(1/7÷2+3) 3/4×88+1/4÷1/88 [1-(3
简算.3/4×4/5÷3/4×5/4 8/13÷7+1/7×6/13 (3/5+1-1/10)
(7/10+1/2)÷3/8-1/5,8/45×5/8+3/7÷9/28,3/10÷(2/5+4/15)-1/5,简便计