30 加法 30 等于多少？
30 + 30 = 60
30加法30 等于 60
竖式演算
验算
- 用减法验算：60 − 30 = 30
- 用减法验算：60 − 30 = 30
相关题目
30 + 29 = 59
30 + 31 = 61
30 + 28 = 58
30 + 32 = 62
30 + 33 = 63
30 + 27 = 57
30 + 34 = 64
30 + 26 = 56
29 + 30 = 59
31 + 30 = 61
28 + 30 = 58
32 + 30 = 62
33 + 30 = 63
27 + 30 = 57
34 + 30 = 64
26 + 30 = 56
1 + 59 = 60
2 + 58 = 60
3 + 57 = 60
4 + 56 = 60
5 + 55 = 60
6 + 54 = 60
61 + 17 = 78
16 + 73 = 89
43 + 23 = 66
8 + 71 = 79
67 + 100 = 167
10 + 75 = 85
79 - 19 = 60
15 × 4 = 60