LET’S TRY ONE
Find the mean of 4, 7 and 10.
7
Their sum is 21; 21 ÷ 3 = 7.
Learning steps & teaching tips
Add data values and divide by the number of values.
- Do not confuse the mean with the middle item in an unsorted list.
- Work through the example. Explain how its evidence supports the answer.
- Try a new question; use the explanation to check your thinking.
Try it together
Write or draw your own example with different numbers. Solve it, then ask a partner to check the method as well as the answer.
Do not confuse the mean with the middle item in an unsorted list.