0.22= 800×5%= ×30%= : =
5×3.14= 94.2÷3.14= 0.2×0.4= 2.5%×3=
195﹣64=
6.8+2.95=
×=
7.5﹣﹣=
+÷40%=
×2.7=
÷=
1÷+÷1=
300×(1+3.75%×2) 0.25×+25%×
[20-(0.4+1)]×50% 5.6×+0.75+3.4×75%