4/7÷4/5= 1÷7/9= 2-4/9= 4/9×4/7= 3/10÷9/10=
1÷2/1÷3/2÷4/3÷5/4÷6/5÷7/6÷8/7÷9/8÷10/9=?
(1+2+3+4+5+6+7+8+9+10)÷55=?
3/10÷20= 9÷3/4= 5/8×1/4= 6/11×5/12= 5/9-1/6= 2/3÷4/7= 1/8+3/
1÷2÷3÷4÷5÷6÷7÷8÷9=2.8添上括号使等式成立
x+2分之1x=12 3分之1x-4分之1x=24 10÷9分之7=x÷5分之4
2/2÷4/7= 2.4÷2/5= 14/15×3/8= 12÷4/7= 8-4/9=
(1+2+3+3+2+1+1+2+3+4+5+6+7+7+8+8+9+9+9+10)÷100=?
5/9×3/10÷3/4=? 2/3×(1÷4/9)=? 23×3/8+23×5/8=? 3/6÷6/7×11=?
1※4=1×2×3×4,6×5=6×7×8×9×10,则(4※5)÷(6※3)=(?
1-1/3-1/4=?,1/7×7÷1/7×7=?,1-5÷9=?,3/4×5/6×8/15=?
简算要过程4/7÷9+3/7×1/9 [1-(1/8+0.25)]÷5/12=?
要过程4/7÷9+3/7×1/9 [1-(1/8+0.25)]÷5/12=?