2 加法 7 等于多少?
2 + 7 = 9
2加法7 等于 9
竖式演算
验算
- 用减法验算:9 − 7 = 2
- 用减法验算:9 − 2 = 7
相关题目
2 + 6 = 8
2 + 8 = 10
2 + 5 = 7
2 + 9 = 11
2 + 4 = 6
2 + 10 = 12
2 + 11 = 13
2 + 3 = 5
1 + 7 = 8
3 + 7 = 10
4 + 7 = 11
5 + 7 = 12
6 + 7 = 13
7 + 7 = 14
8 + 7 = 15
9 + 7 = 16
1 + 8 = 9
3 + 6 = 9
4 + 5 = 9
5 + 4 = 9
6 + 3 = 9
7 + 2 = 9
17 + 100 = 117
51 + 30 = 81
11 + 67 = 78
71 + 8 = 79
1 + 96 = 97
60 + 11 = 71
43 - 34 = 9
46 - 37 = 9