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
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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
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1 + 86 = 87
2 + 85 = 87
3 + 84 = 87
4 + 83 = 87
5 + 82 = 87
6 + 81 = 87
16 + 4 = 20
28 + 42 = 70
92 + 73 = 165
34 + 9 = 43
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69 + 29 = 98
88 - 1 = 87
90 - 3 = 87