30 加法 9 等于多少？
30 + 9 = 39
30加法9 等于 39
竖式演算
验算
- 用减法验算：39 − 9 = 30
- 用减法验算：39 − 30 = 9
相关题目
30 + 8 = 38
30 + 10 = 40
30 + 11 = 41
30 + 7 = 37
30 + 12 = 42
30 + 6 = 36
30 + 13 = 43
30 + 5 = 35
29 + 9 = 38
31 + 9 = 40
28 + 9 = 37
32 + 9 = 41
33 + 9 = 42
27 + 9 = 36
34 + 9 = 43
26 + 9 = 35
1 + 38 = 39
2 + 37 = 39
3 + 36 = 39
4 + 35 = 39
5 + 34 = 39
6 + 33 = 39
51 + 100 = 151
51 + 31 = 82
2 + 90 = 92
31 + 67 = 98
36 + 61 = 97
35 + 4 = 39
51 - 12 = 39
86 - 47 = 39