|
|
2 |
3 |
|
|
6 |
|
|
|
10 |
8 |
|
|
2 |
|
3+2= 2-1= 5-0= 0+0= 4-1= 5-4= 1+2=
0+5= 2+3= 1+1= 4-4= 3-2= 5-5= 5-3=
2+2= 3-0= 1+3= 5+0= 5-1= 4+1= 4-2=
2+=2 5-=4 1+=3 4-=2+1
_________
_________
可以取和,也可以取和。(填序号)
够□ 不够□
够□ 不够□