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
52 + 44 = 96
10 + 8 = 18
52 + 43 = 95
52 + 42 = 94
50 + 47 = 97
22 + 22 = 44
75 - 12 = 63
70 - 7 = 63