43-3+27=
43-(3+27)=
30+11-4=
30+(11-4)=
原有
12支
18把
( )颗
卖出
7支
( )把
8颗
剩下
( )支
9把
7颗
□○□=□(个)
9+2= 16-9= 13-4-5=
15-5= 6+8= 11-3+4=
13-6= 12-7= 12-4-8=
16-8= 14-8= 18-9-0=
4+8= 13-5= 11-8+7
59-3= 67-5= 74-4= 89-8= 97-6=
59-30= 67-50= 74-40= 89-80= 97-60=
12-3=
6+34=
25+7=
47-7=
36-30=
44+20=
90-50=
100-20=
4+29=
15+8=
13-8=
60-9=
25-3=
3+40=
34-8=
24+20=