40 加法 30 等于多少？
40 + 30 = 70
40加法30 等于 70
竖式演算
验算
- 用减法验算：70 − 30 = 40
- 用减法验算：70 − 40 = 30
相关题目
40 + 29 = 69
40 + 31 = 71
40 + 28 = 68
40 + 32 = 72
40 + 33 = 73
40 + 27 = 67
40 + 34 = 74
40 + 26 = 66
39 + 30 = 69
41 + 30 = 71
38 + 30 = 68
42 + 30 = 72
37 + 30 = 67
43 + 30 = 73
44 + 30 = 74
36 + 30 = 66
1 + 69 = 70
2 + 68 = 70
3 + 67 = 70
4 + 66 = 70
5 + 65 = 70
6 + 64 = 70
32 + 21 = 53
11 + 72 = 83
30 + 65 = 95
1 + 11 = 12
95 + 4 = 99
36 + 22 = 58
81 - 11 = 70
82 - 12 = 70