0.52-0.42=
5÷20%=
5m:35cm(求比值)=
×8=
÷=
5-=
×÷×=
12.3÷0.1=
140÷70%=
0.41-0.32=
0.8a+0.5a=
3.14×16=
3.8+6.2 =
0.65 ÷ 1.3 =
×33=
-=
1 ÷ =
75×10%=
+×2=
7×14= 12.2-0.5= 1-30%-30%= 0.42=
-= 8:2.5:4= 2.3+1.77= ÷=
==
1.25×1.6=
5﹣0.25+0.75=
7.2÷40%=
0.33=
6÷()=
0.67×99=
3.14×102 = 16×25%= 10-0.09=
= (-)×12= 36÷30%=