18 加法 12 等于多少？
18 + 12 = 30
18加法12 等于 30
竖式演算
验算
- 用减法验算：30 − 12 = 18
- 用减法验算：30 − 18 = 12
相关题目
18 + 11 = 29
18 + 13 = 31
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18 + 15 = 33
18 + 9 = 27
18 + 16 = 34
18 + 8 = 26
17 + 12 = 29
19 + 12 = 31
20 + 12 = 32
16 + 12 = 28
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15 + 12 = 27
22 + 12 = 34
14 + 12 = 26
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2 + 28 = 30
3 + 27 = 30
4 + 26 = 30
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6 + 24 = 30
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38 + 42 = 80
75 + 54 = 129
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59 - 29 = 30