问题
解答题
王老师统计一次数学考试成绩，参加考试的42名同学的平均成绩为83.5分，在复查中发现，把1名同学的81分错算成了18分。这次考试正确的平均成绩是多少分？
答案
（81-18）÷42+83.5=85（分）
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王老师统计一次数学考试成绩，参加考试的42名同学的平均成绩为83.5分，在复查中发现，把1名同学的81分错算成了18分。这次考试正确的平均成绩是多少分？
（81-18）÷42+83.5=85（分）
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