⚖ The mean: sharing equally

Unit 2 · Algebra & data · 9 min

Mean = sum of the values ÷ how many there are. Imagine moving extra from the big piles to the small ones until all are equal. Example: the mean of 3, 5, 7 is (3+5+7) ÷ 3 = 5.

Words in this lesson

• 平均数 (píngjūnshù) — mean / average
• 总和 (zǒnghé) — sum

Project: Record how many bottles of water your home uses each day for a week and work out the daily mean.