9.01-0.7=
54÷=
2-55%=
2.5×9×0.4=
0.32-0.22=
3.14×4=
++ =
1÷-÷1=
×(+)÷ 37×60%+×37+37 ÷[(+)×]
×(25×32)×
3.06-[1.8×(2.41-1.91)]