Understanding and calculating the range | Maths | Quizalize & Oak National Academy

Starter quiz

Work out: $128 - 94$ = ______

'34' ✓
Work out: $(-28) - (-47)$ = ______

'19' ✓
Work out: $63.8 - 19.7$ = ______

'44.1' ✓
______ are a collection of information.

'Data' ✓
Two numbers have a difference of 10. The smaller number is 53. The other number is ______

'63' ✓
Two positive numbers have a difference of 8. One of the numbers is 6. The other number is ______

'14' ✓

The range is a measure of spread. It is found by finding the ______ between the two extreme points; the lowest and highest values.

'difference' ✓
Select the data sets where you can calculate a range.

4, 7, 5, 8, 3, 1, 0 ✓

cat, dog, rabbit, dog, cat, rabbit, hamster

-4, -2, -5, -1, 0, -7 ✓

5, 5, 5, 5, 5, 5, 5, 5, 5 ✓

ash, birch, oak, maple, sycamore, oak
A large data set has the extreme values of 24.6 and 59.2. The range of the data set is ______.

'34.6 ' ✓
Which of these dot plots is most varied?
This line graph shows data about journey times to school over a week. The range of the journey times is ______ minutes.

'7' ✓
Which of these bar charts show data with a range of 4?

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The range is a measure of spread.
The range is difference between the highest and lowest data point.
The range shows how spread out (far apart) the extreme values in the data set are.

Pupils may often write the range as '3 to 10' or '10 - 3' rather than a single value.

Remind pupils that the range is a single value which describes how far apart the extreme values are.

Range - The range is a measure of spread. It is found by finding the difference between the highest and lowest values.
Spread/dispersion - The spread/dispersion of data values describes how far apart the pieces of data are.