24 加法 21 等于多少？
24 + 21 = 45
24加法21 等于 45
竖式演算
验算
- 用减法验算：45 − 21 = 24
- 用减法验算：45 − 24 = 21
相关题目
24 + 20 = 44
24 + 22 = 46
24 + 19 = 43
24 + 23 = 47
24 + 24 = 48
24 + 18 = 42
24 + 25 = 49
24 + 17 = 41
23 + 21 = 44
25 + 21 = 46
22 + 21 = 43
26 + 21 = 47
21 + 21 = 42
27 + 21 = 48
20 + 21 = 41
28 + 21 = 49
1 + 44 = 45
2 + 43 = 45
3 + 42 = 45
4 + 41 = 45
5 + 40 = 45
6 + 39 = 45
22 + 67 = 89
92 + 2 = 94
13 + 80 = 93
6 + 63 = 69
56 + 11 = 67
48 + 31 = 79
65 - 20 = 45
60 - 15 = 45