2 加法 40 等于多少？
2 + 40 = 42
2加法40 等于 42
竖式演算
验算
- 用减法验算：42 − 40 = 2
- 用减法验算：42 − 2 = 40
相关题目
2 + 39 = 41
2 + 41 = 43
2 + 38 = 40
2 + 42 = 44
2 + 37 = 39
2 + 43 = 45
2 + 44 = 46
2 + 36 = 38
1 + 40 = 41
3 + 40 = 43
4 + 40 = 44
5 + 40 = 45
6 + 40 = 46
7 + 40 = 47
8 + 40 = 48
9 + 40 = 49
1 + 41 = 42
3 + 39 = 42
4 + 38 = 42
5 + 37 = 42
6 + 36 = 42
7 + 35 = 42
100 + 11 = 111
22 + 61 = 83
50 + 42 = 92
14 + 65 = 79
10 + 2 = 12
22 + 57 = 79
86 - 44 = 42
78 - 36 = 42