78 加法 9 等于多少？
78 + 9 = 87
78加法9 等于 87
竖式演算
验算
- 用减法验算：87 − 9 = 78
- 用减法验算：87 − 78 = 9
相关题目
78 + 8 = 86
78 + 10 = 88
78 + 11 = 89
78 + 7 = 85
78 + 12 = 90
78 + 6 = 84
78 + 13 = 91
78 + 5 = 83
77 + 9 = 86
79 + 9 = 88
76 + 9 = 85
80 + 9 = 89
75 + 9 = 84
81 + 9 = 90
74 + 9 = 83
82 + 9 = 91
1 + 86 = 87
2 + 85 = 87
3 + 84 = 87
4 + 83 = 87
5 + 82 = 87
6 + 81 = 87
90 + 99 = 189
12 + 38 = 50
38 + 81 = 119
33 + 27 = 60
42 + 19 = 61
91 + 98 = 189
90 - 3 = 87
88 - 1 = 87