1+75%=
÷2=
0.2×50=
70%-20%=
4÷8×=
÷25%=
10×10%=
63÷90%=
5×÷5×=
x:=0.5: = 0.2x-1.5=
3.75:x=3:12 (x-0.6)× =2.25 25%: =x:
9.01-0.7=
54÷=
2-55%=
2.5×9×0.4=
0.32-0.22=
3.14×4=
++ =
1÷-÷1=
10÷1%=