4-( )=2
6-( )=3
8-( )=4
10-( )=5
12-( )=6
14-( )=7
16-( )=8
18-( )=9
20-( )=10
12-( )=4
15-( )=7
11-( )=9
13-( )=6
17-( )=8
13-( )=9
口答:一共可以装满□车。
原来有多少个篮球?
30+5070 4095-40 56+756-7 6560+5