21 加法 68 等于多少？
21 + 68 = 89
21加法68 等于 89
竖式演算
验算
- 用减法验算：89 − 68 = 21
- 用减法验算：89 − 21 = 68
相关题目
21 + 67 = 88
21 + 69 = 90
21 + 66 = 87
21 + 70 = 91
21 + 65 = 86
21 + 71 = 92
21 + 64 = 85
21 + 72 = 93
20 + 68 = 88
22 + 68 = 90
19 + 68 = 87
23 + 68 = 91
24 + 68 = 92
18 + 68 = 86
25 + 68 = 93
17 + 68 = 85
1 + 88 = 89
2 + 87 = 89
3 + 86 = 89
4 + 85 = 89
5 + 84 = 89
6 + 83 = 89
15 + 52 = 67
43 + 42 = 85
60 + 38 = 98
60 + 22 = 82
40 + 57 = 97
20 + 73 = 93
1 × 89 = 89
94 - 5 = 89