Well done! That's the right answer.
Hint



Test
44 + 29 =     
44    +
+
0
1
2
3
4
5
6
7
8
9
43 + 37 =     
43    +
+
0
1
2
3
4
5
6
7
8
9
54 + 27 =     
54    +
+
0
1
2
3
4
5
6
7
8
9