30 加法 4 等于多少？
30 + 4 = 34
30加法4 等于 34
竖式演算
验算
- 用减法验算：34 − 4 = 30
- 用减法验算：34 − 30 = 4
相关题目
30 + 3 = 33
30 + 5 = 35
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30 + 6 = 36
30 + 1 = 31
30 + 7 = 37
30 + 8 = 38
30 + 9 = 39
29 + 4 = 33
31 + 4 = 35
28 + 4 = 32
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2 + 32 = 34
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