69 加法 20 等于多少？
69 + 20 = 89
69加法20 等于 89
竖式演算
验算
- 用减法验算：89 − 20 = 69
- 用减法验算：89 − 69 = 20
相关题目
69 + 19 = 88
69 + 21 = 90
69 + 22 = 91
69 + 18 = 87
69 + 23 = 92
69 + 17 = 86
69 + 24 = 93
69 + 16 = 85
68 + 20 = 88
70 + 20 = 90
67 + 20 = 87
71 + 20 = 91
66 + 20 = 86
72 + 20 = 92
65 + 20 = 85
73 + 20 = 93
1 + 88 = 89
2 + 87 = 89
3 + 86 = 89
4 + 85 = 89
5 + 84 = 89
6 + 83 = 89
11 + 70 = 81
40 + 52 = 92
62 + 24 = 86
57 + 40 = 97
5 + 72 = 77
93 + 6 = 99
89 × 1 = 89
99 - 10 = 89