12-3= 14-7= 8+4= 30+70=
30+7= 42-2= 50+6= 17-9=
20-9= 55-50= 36-6= 18-9=
63-3= 25-5= 77-70= 15-6=
11-3=
25-5=
14-6+4=
53-3=
8+70=
13-9+10=
66-60=
19-7=
73-70+14=
= (个) = (个)
8+6=
13﹣7=
11﹣3=
15﹣7=
12﹣4=
17﹣9=
6+70=
30+8=
11﹣2=
9+7=
16﹣8=
18﹣9=
66﹣6=
98﹣90=
7+50=
37﹣7=
90+9=
65﹣5=
87﹣80=
9+60=
85﹣5=
7+90=
16﹣9=
11﹣4﹣3=
57=50+
35﹣30=
14﹣8=
8+7﹣9=
13﹣6=
12﹣5=
3+20=
13﹣5+9=
7+60=
59﹣9=
20+7 81-3 64+7 42-40 37-2
>>>>