15 加法 15 等于多少？
15 + 15 = 30
15加法15 等于 30
竖式演算
验算
- 用减法验算：30 − 15 = 15
- 用减法验算：30 − 15 = 15
相关题目
15 + 14 = 29
15 + 16 = 31
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15 + 12 = 27
15 + 18 = 33
15 + 11 = 26
15 + 19 = 34
14 + 15 = 29
16 + 15 = 31
13 + 15 = 28
17 + 15 = 32
12 + 15 = 27
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2 + 28 = 30
3 + 27 = 30
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5 + 25 = 30
6 + 24 = 30
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52 + 38 = 90
9 + 76 = 85
98 + 71 = 169
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