43+55=
12+40=
41-22=
92-70=
99-23=
18+29+37=
29-13=
5×7=
19-14=
4×9=
86-11=
83-17-22=
72-30=
89-20=
7×3=
13+29=
3×0=
2×3-2=
8×6=
97-67=
17+38=
58-25=
70-54=
9×9-7=
□○□○□=□(个)
或□○□○□=□(个)
=
