3.6+7.5=
202﹣98=
910÷13=
2.5×0.4=
+=
5-=
÷=
3÷2×=
1.5×1= 910÷70= 2.2﹣1.9= 6÷7= 435+199=
+= -= ÷= 20×= ×=
62+48=