10﹣0.78=
7.5×20%=
×1.6=
2.5×4+2.5×4=
0.52=
0.8÷0.01=
1﹣1÷9=
24×25%=
135+398= 5﹣0.5= 0.24×50= 2﹣2÷7=
÷2= 1.25×9×8= += (+)×72=
728﹣299= 0.23= 3.6×25%= 6÷=
8﹣1.3﹣1.7=