5/9×3/10÷3/4=? 2/3×（1÷4/9）=? 23×3/8+23×5/8=? 3/6÷6/7×11=?

4/7÷4/5= 1÷7/9= 2-4/9= 4/9×4/7= 3/10÷9/10= (3/4 ＋ 1/5) * 10/3 ÷ 9/2 1÷(1÷2)÷(2÷3)÷(3÷4)÷.÷(8÷9)÷(9÷10)=? 13/11÷26= 5/8×5= 3/2÷2/3= 8/15×9/10= 5/8×4/15=9/10÷12/5= 21×3/35= 45÷9/5×2/81= 9×5/6÷5/12= 30÷2/3÷4/5= 5/9×11/3×1/2= 3/7÷7/13×14/9= 4/7×28÷1/10= 4/9÷12=( )3/5÷4/7=( )2÷3=( )6÷2/3=( ) 1+2+3+4+5+6+7+8+9+10÷11÷12×0=? 2/5+3/5×4/9÷4/5=? 2/5×(3/4+1/5)÷9/10 (1).x^12÷x^3*x^4(2).(-9)^1004÷27^669(3).(6×10^8)÷(3×10^5)(4).若10^a=20,10^b=5^-1,求9^a÷3^(2b) 1÷2/1÷3/2÷4/3÷5/4÷6/5÷7/6÷8/7÷9/8÷10/9=? 15/22÷10= 45÷9/14= 3/5÷1/6= 2/7÷8/21= 2/9×15/22÷10= 45÷9/14= 3/5÷1/6= 2/7÷8/21= 2/9×3/8÷6/7= 4÷8/3－3/5= 3/4×5/6+3/4×1/6= 5/6x=7/10 3/4x+5/8x=22/9 X÷9/16=4/9÷2/3 4-3/22= 3/8÷5/24= 35×2/5=4-3/22= 3/8÷5/24= 35×2/5= 9×3/5= 25×3/5= 2/3+1/8= 7/8×3/14= 5/6-1/2= 39×9/13= 4/5-1/8= 7/10÷7/12= 10/9-1/9= 2/3×1/4= 36÷4/9= (10-9/2÷3)×2/5 8÷(-2)²-(-9/5)÷(3/5)²=?8÷(-2)²-(-9/5)÷(3/5)²=2/3 + 3/5 ÷ （-2/5) - 3/4 × （-4/5)=?8÷(-2)²-(-9/5)÷(3/5)²= 2/3 + 3/5 ÷ （-2/5) - 3/4 × （-4/5)=?不小心连一块了。 1+2+3+4+5+6+7+8+9+10÷5=?只能口算 8/9x=4/5 2/3x÷1/4=12 3/4x÷1/6=18 (10/9-2/3)x=8/9x=4/5 2/3x÷1/4=12 3/4x÷1/6=18 (10/9-2/3)x=1/6 5/9×3/10÷3/4=? 2/3×（1÷4/9）=? 23×3/8+23×5/8=? 3/6÷6/7×11=?