12-0=
17-5=
13-3=
19-7=
14-4=
现在车上有多少人?
=
914 66 1017 97
10+49-3 8-43 6-36+3 10+79-6
35 109 88 810
1415 1718 1920 122
106 97 1115 1919
10-65 9+814 7+68+7
157+8 9+1120 17-76+5
10-45 8+717 11+38+5
177+7 8+1220 18-48+6
6+914 17-78 157+8
16-516-3 5+66+5 8+48-4
13-77 18-910 132+10
12-66 13+310 12-47