47 加法 21 等于多少？
47 + 21 = 68
47加法21 等于 68
竖式演算
验算
- 用减法验算：68 − 21 = 47
- 用减法验算：68 − 47 = 21
相关题目
47 + 20 = 67
47 + 22 = 69
47 + 19 = 66
47 + 23 = 70
47 + 24 = 71
47 + 18 = 65
47 + 25 = 72
47 + 17 = 64
46 + 21 = 67
48 + 21 = 69
49 + 21 = 70
45 + 21 = 66
50 + 21 = 71
44 + 21 = 65
51 + 21 = 72
43 + 21 = 64
1 + 67 = 68
2 + 66 = 68
3 + 65 = 68
4 + 64 = 68
5 + 63 = 68
6 + 62 = 68
13 + 66 = 79
3 + 6 = 9
10 + 15 = 25
86 + 12 = 98
71 + 100 = 171
12 + 85 = 97
88 - 20 = 68
97 - 29 = 68