27 加法 21 等于多少？
27 + 21 = 48
27加法21 等于 48
竖式演算
验算
- 用减法验算：48 − 21 = 27
- 用减法验算：48 − 27 = 21
相关题目
27 + 20 = 47
27 + 22 = 49
27 + 19 = 46
27 + 23 = 50
27 + 24 = 51
27 + 18 = 45
27 + 25 = 52
27 + 17 = 44
26 + 21 = 47
28 + 21 = 49
29 + 21 = 50
25 + 21 = 46
30 + 21 = 51
24 + 21 = 45
31 + 21 = 52
23 + 21 = 44
1 + 47 = 48
2 + 46 = 48
3 + 45 = 48
4 + 44 = 48
5 + 43 = 48
6 + 42 = 48
4 + 94 = 98
74 + 100 = 174
13 + 40 = 53
12 + 50 = 62
17 + 80 = 97
33 + 36 = 69
12 × 4 = 48
97 - 49 = 48