1. 44+33-55=
2. 97-39+27=
3. 52-12+8=
答案:
1. 44+33-55= 22
4 4
+ 3 3
7 7
- 5 5
2 2
2. 97-39+27= 95
9 7
- 3 9
5 8
+ 2 7
9 5
3. 52-12+8=48
5 2
- 1 2
4 0
+ 8
4 8