40 加法 40 等于多少？
40 + 40 = 80
40加法40 等于 80
竖式演算
验算
- 用减法验算：80 − 40 = 40
- 用减法验算：80 − 40 = 40
相关题目
40 + 39 = 79
40 + 41 = 81
40 + 38 = 78
40 + 42 = 82
40 + 37 = 77
40 + 43 = 83
40 + 44 = 84
40 + 36 = 76
39 + 40 = 79
41 + 40 = 81
38 + 40 = 78
42 + 40 = 82
37 + 40 = 77
43 + 40 = 83
44 + 40 = 84
36 + 40 = 76
1 + 79 = 80
2 + 78 = 80
3 + 77 = 80
4 + 76 = 80
5 + 75 = 80
6 + 74 = 80
31 + 41 = 72
53 + 41 = 94
2 + 55 = 57
32 + 46 = 78
15 + 100 = 115
50 + 8 = 58
95 - 15 = 80
99 - 19 = 80