9 加法 40 等于多少？
9 + 40 = 49
9加法40 等于 49
竖式演算
验算
- 用减法验算：49 − 40 = 9
- 用减法验算：49 − 9 = 40
相关题目
9 + 39 = 48
9 + 41 = 50
9 + 38 = 47
9 + 42 = 51
9 + 37 = 46
9 + 43 = 52
9 + 44 = 53
9 + 36 = 45
8 + 40 = 48
10 + 40 = 50
11 + 40 = 51
7 + 40 = 47
12 + 40 = 52
6 + 40 = 46
13 + 40 = 53
5 + 40 = 45
1 + 48 = 49
2 + 47 = 49
3 + 46 = 49
4 + 45 = 49
5 + 44 = 49
6 + 43 = 49
63 + 23 = 86
18 + 31 = 49
26 + 31 = 57
62 + 26 = 88
100 + 35 = 135
51 + 47 = 98
68 - 19 = 49
84 - 35 = 49