幼儿园某班早餐人数为10人,午餐人数为20人,晚餐人数为12人,计算该班的人日数。
人日数=(早餐人数+午餐人数+晚餐人数)÷3 (2分) =(10 + 20+12) ÷3 (1 分) =14 (1 分)
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