3.14×9=
8.1÷0.3=
3.14×16=
×8=
÷=
×=
1÷25%=
89÷4=
58×415=
57÷52=
2.4×13=
28×301%≈
1-58=
425﹣199=
557÷69≈
5.2÷0.125÷8=
27÷72=
12+13=
8.2﹣2=
7-27=
34×0+3=
3.5+4.5=
13+17=
3.6÷40%=
4r2-22=
2.01-0.1=
715:2125=
20×15%=
711×5÷711×5=