60-20=
5×9=
36+4=
57+8=
76-40=
8×4=
7×5=
70-7=
9×9=
6×5=
2×7=
53-8=
26+30-5=
12-3×2=
7×9+3=
89-32-7=
12+50=
45-6=
9×4+6=
17+31=
61-11-30=
95-19=
78-18=
8×6-6=
3×9=
76-(80-4)=
4×1=
5×4+30=
99-14=
16+80=
3×6-8=
2×3=
4×6-4=
74-(80-6)=
五三十 四八 八九
综合算式: