20 加法 28 等于多少？
20 + 28 = 48
20加法28 等于 48
竖式演算
验算
- 用减法验算：48 − 28 = 20
- 用减法验算：48 − 20 = 28
相关题目
20 + 29 = 49
20 + 27 = 47
20 + 30 = 50
20 + 26 = 46
20 + 31 = 51
20 + 25 = 45
20 + 32 = 52
20 + 24 = 44
19 + 28 = 47
21 + 28 = 49
22 + 28 = 50
18 + 28 = 46
23 + 28 = 51
17 + 28 = 45
24 + 28 = 52
16 + 28 = 44
1 + 47 = 48
2 + 46 = 48
3 + 45 = 48
4 + 44 = 48
5 + 43 = 48
6 + 42 = 48
8 + 100 = 108
22 + 72 = 94
12 + 73 = 85
21 + 45 = 66
74 + 1 = 75
46 + 52 = 98
16 × 3 = 48
48 × 1 = 48