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
17 + 10 = 27
30 + 66 = 96
71 + 11 = 82
19 + 40 = 59
1 + 34 = 35
53 + 31 = 84
76 - 10 = 66
75 - 9 = 66