9 加法 9 等于多少?
9 + 9 = 18
9加法9 等于 18
竖式演算
验算
- 用减法验算:18 − 9 = 9
- 用减法验算:18 − 9 = 9
相关题目
9 + 8 = 17
9 + 10 = 19
9 + 11 = 20
9 + 7 = 16
9 + 12 = 21
9 + 6 = 15
9 + 13 = 22
9 + 5 = 14
8 + 9 = 17
10 + 9 = 19
11 + 9 = 20
7 + 9 = 16
12 + 9 = 21
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2 + 16 = 18
3 + 15 = 18
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6 + 12 = 18
8 + 54 = 62
27 + 39 = 66
7 + 65 = 72
93 + 72 = 165
82 + 50 = 132
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56 - 38 = 18