1-+=
1÷×=
0.5-+0.5-=
÷75%=
(+)×24=
7÷×7÷=
100÷50%=
10.2+80%=
0.5×0.1÷0.5=
0.25×1.25÷ 8.5×80%+1.5÷
( + )×17×21 2022 ×
6.5:x=3.25:4 24%:=