20 加法 69 等于多少？
20 + 69 = 89
20加法69 等于 89
竖式演算
验算
- 用减法验算：89 − 69 = 20
- 用减法验算：89 − 20 = 69
相关题目
20 + 68 = 88
20 + 70 = 90
20 + 67 = 87
20 + 71 = 91
20 + 66 = 86
20 + 72 = 92
20 + 65 = 85
20 + 73 = 93
19 + 69 = 88
21 + 69 = 90
22 + 69 = 91
18 + 69 = 87
23 + 69 = 92
17 + 69 = 86
24 + 69 = 93
16 + 69 = 85
1 + 88 = 89
2 + 87 = 89
3 + 86 = 89
4 + 85 = 89
5 + 84 = 89
6 + 83 = 89
20 + 38 = 58
65 + 31 = 96
5 + 41 = 46
44 + 23 = 67
78 + 100 = 178
67 + 21 = 88
91 - 2 = 89
93 - 4 = 89