Step by step
The question
Question: find the range of 4, 7, 9, 3, 7 and 6.
Range of 4, 7, 9, 3, 7, 6
The range shows how spread out the numbers are: the biggest minus the smallest.
range = biggest − smallest
1 Put them in order
First we put them in order, smallest first: 3, 4, 6, 7, 7 and 9.
3, 4, 6, 7, 7, 9
We still have 6 numbers.
None is lost.
6 numbers ✓
2 Smallest and biggest
In order, the smallest is first and the biggest is last.
The smallest is 3.
The biggest is 9.
smallest = 3, biggest = 9
3 Take away
The range is the biggest minus the smallest.
range = 9 − 3
9 minus 3 is 6.
range = 6
Let's look back.
First: put them in order.
Then: smallest and biggest.
Last: take away.
Answer
range = 6