120:75
0.96:1.2
18:0.15
:6
0.25=
1.4=
0.123=
1.05=
0.38=
0.055=
3=
0.908=
3.14×0.5=
10÷50%=
2-=
- =
+×=
5×÷5×=
1.09+11%=
×17=
=
1.2÷=
×0.375=
0.3×=
10﹣0.9= 28+82= 20×5%= +×0=
4.8÷0.8= += ×= 1÷-1=