10﹣5.2=
7÷=
4×0.5=
0.52÷0.42=
48÷0.04=
48×25%=
1÷1%=
3.5+6.45=
657﹣298=
2.4×=
562÷79≈
21×498≈
①0.83+1.675 ②756+1328 ③+ ④57%+
□○□=□(元)