30 加法 50 等于多少？
30 + 50 = 80
30加法50 等于 80
竖式演算
验算
- 用减法验算：80 − 50 = 30
- 用减法验算：80 − 30 = 50
相关题目
30 + 49 = 79
30 + 51 = 81
30 + 48 = 78
30 + 52 = 82
30 + 47 = 77
30 + 53 = 83
30 + 46 = 76
30 + 54 = 84
29 + 50 = 79
31 + 50 = 81
28 + 50 = 78
32 + 50 = 82
33 + 50 = 83
27 + 50 = 77
34 + 50 = 84
26 + 50 = 76
1 + 79 = 80
2 + 78 = 80
3 + 77 = 80
4 + 76 = 80
5 + 75 = 80
6 + 74 = 80
26 + 2 = 28
39 + 100 = 139
87 + 10 = 97
65 + 30 = 95
47 + 32 = 79
7 + 51 = 58
87 - 7 = 80
40 × 2 = 80