45+3=
30+9=
53+7=
42-5=
67-4=
86-80=
91-5=
28+6=
50+50=
50+5=
70-30=
48+6=
42+50=
35-7=
18+20=
54+40=
33+30=
56-8=
52+20=
65-5=
= (个) = (个)
15-7= 8+5= 7+6= 18-9=
19-5= 12-9= 16-8= 11-2-1=
8+8= 9+5= 13-5= 12-3+3=
18-9= 7+9 56-6= 30+7=
14-8= 11-7= 76-6= 8+60=
12-5+4= 85-5+6= 16-2-5= 18-3+3=
30-4= 50-6= 70-8= 80-3= 60-2=
21-8= 32-6= 43-4= 54-9= 65-8=
76-9= 87-8= 91-3= 35-8= 23-5=
44-5= 36-9= 23-8= 54-6= 60-8=
9+6= 13-5= 6+6= 8-8= 10-3+7=
18-10= 4+16= 11-5= 11-3= 2+10-8=
17-8= 7+1= 7+11= 6+0= 10+8-9=
12+6= 2+10= 15-5= 10-4= 16-3-3=
12﹣3.6= 12×0.5= 36×25%= ×6+=
+= ÷4= 0××5= 28÷1.25÷8=