7 + 2= 8 - 0= 6 + 1= 6 - 3=
5 + 4= 10 - 6= 3 + 4= 10 - 9=
(个)
97 1311 19-118
6+310 14-104 8+79+7
0.25×8= 50%×0.4= 7÷7%= 23=