÷3=
×15=
1+2%=
+ × =
2- =
×75%=
×4× =
×9÷ ×9=
× =
6﹣4.92=
25×0.7×4=
+0.5=
3- =
6.3÷0.21=
1﹣1÷ =
(0.6- )×16=