①
②
80-50= 77-22= 44-23= 32+4= 15+21=
59-6= 19+9= 60+20= 52-30= 43+9=
3×4=
5×9=
2×7=
4×4+5=
9×1=
40+50=
8×6=
7×7-8=
6×9=
7×8=
60-6=
5×6-5=
加法算式:
乘法算式: