①3成=
②75%=_____折
③六成五=____%
④80%=_____成
⑤3%×5=
⑥2.11×0.1=
⑦3×22=
⑧3.1×0.3=
195﹣64=
6.8+2.95=
×=
7.5﹣﹣=
+÷40%=
×2.7=
÷=
1÷+÷1=