21 加法 45 等于多少？
21 + 45 = 66
21加法45 等于 66
竖式演算
验算
- 用减法验算：66 − 45 = 21
- 用减法验算：66 − 21 = 45
相关题目
21 + 44 = 65
21 + 46 = 67
21 + 47 = 68
21 + 43 = 64
21 + 48 = 69
21 + 42 = 63
21 + 49 = 70
21 + 41 = 62
20 + 45 = 65
22 + 45 = 67
19 + 45 = 64
23 + 45 = 68
24 + 45 = 69
18 + 45 = 63
25 + 45 = 70
17 + 45 = 62
1 + 65 = 66
2 + 64 = 66
3 + 63 = 66
4 + 62 = 66
5 + 61 = 66
6 + 60 = 66
22 + 2 = 24
11 + 3 = 14
22 + 3 = 25
3 + 24 = 27
3 + 91 = 94
13 + 41 = 54
84 - 18 = 66
86 - 20 = 66