加法口诀如下：
1 + 1 = 2
1 + 2 = 3
1 + 3 = 4
1 + 4 = 5
1 + 5 = 6
1 + 6 = 7
1 + 7 = 8
2 + 2 = 4
2 + 3 = 5
2 + 4 = 6
2 + 5 = 7
2 + 6 = 8
2 + 7 = 9
3 + 3 = 6
3 + 4 = 7
3 + 5 = 8
3 + 6 = 9
3 + 7 = 10
4 + 4 = 8
4 + 5 = 9
4 + 6 = 10
4 + 7 = 11
5 + 5 = 10
5 + 6 = 11
5 + 7 = 12
6 + 6 = 12
6 + 7 = 13
7 + 7 = 14
8 + 8 = 16
这些口诀可以帮助孩子们快速计算 1 到 8 的加法，提高计算速度和准确性。