7+7 10-3 13+5 11+2 20-10 14-5
> > > > >
12-47 15-618-7 13-714-8
14-68 16-99+9 12-611-4
19-911 5+711-3 15-712-4
原有
11筐
筐
卖出
2筐
现有
7筐
9筐
比 多( )个。
14+4 = 16-5 = 9+6 = 7+9 = 10+10 =
19-8 = 3+7 = 5+10 = 13-6 = 11-5 =
16-9 = 8+8 = 3+14 = 17-8 = 7+6 =
7+7 = 12-8 = 15-8 = 8+3 = 11-4 =