2+5=
3-1=
5-5=
1+4=
1+5=
6+1=
0+4=
6-3=
3-2=
7-7=
7-3=
5+2=
7-6=
1+6=
6-4=
4+2=
2+3=
2+2=
0+0=
6-0=
98 40 5-50 8-45
3+6 8-6 9-58-3 5+48+1 10-88+2
810÷30= 0.38+3.8= 0.15×0.2=
÷= ﹣×0= ×3÷3×=