15-8= | 16-7= | 29-9= | 13-4+8= |
13-9= | 11-8= | 15-10= | 6+6-9= |
12-6= | 14-5= | 68-8= | 17-8+3= |
31+8= 20+39= 36-24= 65-35=
13-4= | 50+8= | 2+90= | 14-6= | 13-5+9= |
88-80= | 40+3= | 64-4= | 7+50= | 19-10-7= |
答:( )班和( )班刚好可以乘坐同一辆车。
38 - 5 + 20 = 30 + 12 - 7 = 39 +(24 + 6)=
50 + 45 + 5 = 60 +(18 - 8)= 34 -(3 + 6)=