3 加法 4 等于多少？
3 + 4 = 7
3加法4 等于 7
竖式演算
验算
- 用减法验算：7 − 4 = 3
- 用减法验算：7 − 3 = 4
相关题目
3 + 3 = 6
3 + 5 = 8
3 + 2 = 5
3 + 6 = 9
3 + 1 = 4
3 + 7 = 10
3 + 8 = 11
3 + 9 = 12
2 + 4 = 6
4 + 4 = 8
1 + 4 = 5
5 + 4 = 9
6 + 4 = 10
7 + 4 = 11
8 + 4 = 12
9 + 4 = 13
1 + 6 = 7
2 + 5 = 7
4 + 3 = 7
5 + 2 = 7
6 + 1 = 7
4 + 53 = 57
60 + 11 = 71
3 + 66 = 69
57 + 31 = 88
42 + 43 = 85
44 + 43 = 87
76 - 69 = 7
79 - 72 = 7
54 - 47 = 7