50 加法 20 等于多少？
50 + 20 = 70
50加法20 等于 70
竖式演算
验算
- 用减法验算：70 − 20 = 50
- 用减法验算：70 − 50 = 20
相关题目
50 + 19 = 69
50 + 21 = 71
50 + 22 = 72
50 + 18 = 68
50 + 23 = 73
50 + 17 = 67
50 + 24 = 74
50 + 16 = 66
49 + 20 = 69
51 + 20 = 71
48 + 20 = 68
52 + 20 = 72
47 + 20 = 67
53 + 20 = 73
46 + 20 = 66
54 + 20 = 74
1 + 69 = 70
2 + 68 = 70
3 + 67 = 70
4 + 66 = 70
5 + 65 = 70
6 + 64 = 70
67 + 12 = 79
57 + 42 = 99
36 + 11 = 47
56 + 40 = 96
53 + 36 = 89
3 + 63 = 66
14 × 5 = 70
76 - 6 = 70