21 加法 47 等于多少？
21 + 47 = 68
21加法47 等于 68
竖式演算
验算
- 用减法验算：68 − 47 = 21
- 用减法验算：68 − 21 = 47
相关题目
21 + 46 = 67
21 + 48 = 69
21 + 49 = 70
21 + 45 = 66
21 + 50 = 71
21 + 44 = 65
21 + 51 = 72
21 + 43 = 64
20 + 47 = 67
22 + 47 = 69
19 + 47 = 66
23 + 47 = 70
24 + 47 = 71
18 + 47 = 65
25 + 47 = 72
17 + 47 = 64
1 + 67 = 68
2 + 66 = 68
3 + 65 = 68
4 + 64 = 68
5 + 63 = 68
6 + 62 = 68
10 + 79 = 89
16 + 73 = 89
31 + 43 = 74
41 + 7 = 48
55 + 34 = 89
49 + 10 = 59
4 × 17 = 68
77 - 9 = 68