21 加法 42 等于多少？
21 + 42 = 63
21加法42 等于 63
竖式演算
验算
- 用减法验算：63 − 42 = 21
- 用减法验算：63 − 21 = 42
相关题目
21 + 41 = 62
21 + 43 = 64
21 + 40 = 61
21 + 44 = 65
21 + 39 = 60
21 + 45 = 66
21 + 38 = 59
21 + 46 = 67
20 + 42 = 62
22 + 42 = 64
19 + 42 = 61
23 + 42 = 65
24 + 42 = 66
18 + 42 = 60
25 + 42 = 67
17 + 42 = 59
1 + 62 = 63
2 + 61 = 63
3 + 60 = 63
4 + 59 = 63
5 + 58 = 63
6 + 57 = 63
25 + 72 = 97
15 + 82 = 97
11 + 20 = 31
25 + 44 = 69
15 + 64 = 79
5 + 81 = 86
86 - 23 = 63
100 - 37 = 63