3.14×16=
3.8+6.2 =
0.65 ÷ 1.3 =
×33=
-=
1 ÷ =
75×10%=
+×2=
9﹣ = × = 1÷1%= 1÷ =
7×60%= × = 15.7÷3.14= 63×60%+ ×37=
=4.2 ÷=27 74:=6:0.3
:x=3:12
4+0.7x=7.15
①x:16=5:8
②
③
④18∶0.2=x∶