7 加法 42 等于多少？
7 + 42 = 49
7加法42 等于 49
竖式演算
验算
- 用减法验算：49 − 42 = 7
- 用减法验算：49 − 7 = 42
相关题目
7 + 41 = 48
7 + 43 = 50
7 + 40 = 47
7 + 44 = 51
7 + 39 = 46
7 + 45 = 52
7 + 38 = 45
7 + 46 = 53
6 + 42 = 48
8 + 42 = 50
5 + 42 = 47
9 + 42 = 51
4 + 42 = 46
10 + 42 = 52
11 + 42 = 53
3 + 42 = 45
1 + 48 = 49
2 + 47 = 49
3 + 46 = 49
4 + 45 = 49
5 + 44 = 49
6 + 43 = 49
62 + 17 = 79
66 + 3 = 69
14 + 53 = 67
14 + 100 = 114
8 + 81 = 89
70 + 23 = 93
87 - 38 = 49
96 - 47 = 49