21 加法 24 等于多少？
21 + 24 = 45
21加法24 等于 45
竖式演算
验算
- 用减法验算：45 − 24 = 21
- 用减法验算：45 − 21 = 24
相关题目
21 + 23 = 44
21 + 25 = 46
21 + 22 = 43
21 + 26 = 47
21 + 21 = 42
21 + 27 = 48
21 + 20 = 41
21 + 28 = 49
20 + 24 = 44
22 + 24 = 46
19 + 24 = 43
23 + 24 = 47
24 + 24 = 48
18 + 24 = 42
25 + 24 = 49
17 + 24 = 41
1 + 44 = 45
2 + 43 = 45
3 + 42 = 45
4 + 41 = 45
5 + 40 = 45
6 + 39 = 45
40 + 100 = 140
1 + 98 = 99
56 + 32 = 88
5 + 33 = 38
57 + 32 = 89
92 + 5 = 97
66 - 21 = 45
77 - 32 = 45