4 加法 77 等于多少？
4 + 77 = 81
4加法77 等于 81
竖式演算
验算
- 用减法验算：81 − 77 = 4
- 用减法验算：81 − 4 = 77
相关题目
4 + 76 = 80
4 + 78 = 82
4 + 75 = 79
4 + 79 = 83
4 + 74 = 78
4 + 80 = 84
4 + 73 = 77
4 + 81 = 85
3 + 77 = 80
5 + 77 = 82
2 + 77 = 79
6 + 77 = 83
1 + 77 = 78
7 + 77 = 84
8 + 77 = 85
9 + 77 = 86
1 + 80 = 81
2 + 79 = 81
3 + 78 = 81
5 + 76 = 81
6 + 75 = 81
7 + 74 = 81
70 + 44 = 114
91 + 53 = 144
9 + 81 = 90
83 + 84 = 167
94 + 62 = 156
89 + 7 = 96
9 × 9 = 81
94 - 13 = 81