比多个,比少个。
3
5
6
4
8
9
7
10
12-65 14-78 16-811-3
15-86 11-92 17-912-3
3+=12 +6=14 9+=18
15-7= 9+=15 +7=14
★+4= 7 ★+□= 11 □+△=12
★=
□=
△=
15-6=
11-6 13-7 15-8 14-8 12-9
15-7= 13-8= 12-4= 15-5=
12-8= 11-7= 18-9= 14-5=
4+6= 12-9= 11-9= 16-9=
19-9= 13-7= 14-7= 17-9=
13-4=□-□=□-□=□-□
16-8 11-4 12-7 15-9 17-8
14-9 12-3 16-9 14-6 11-5