-+ +(-) -- ++0.75+
202.2÷0.1= 13÷11= 5.6+4.4-0.53=
0.5³= ( )÷7= 1.8×0.5÷1.8×0.5=
17.2+2.8=
0.6×0.9=
8÷0.8=
0.25a+0.5a=
123÷100=
0.74×100=
2.7÷3=
3-1.48=
0.25a+0.05×2=
- = - = + = + = 3- =
53= + = = + - =
①
②
③
④
25×0.134×4
10.1×18