Solve problems by counting forwards and backwards in multiples of 2, 20, 5, 50 and 25 | Maths

Starter quiz

Which multiple of 20 comes next: 120, 140, 160, ______?

'180' ✓
Order the numbers so that the count is in the correct order, starting with the smallest.

1

⇔

150

2

⇔

200

3

⇔

250

4

⇔

300

5

⇔

350
What number is missing from the number track?

'300' ✓
What number is missing from the number track?

'480' ✓
What are the next three numbers in this count: 585, 590, 595, ___, ___, ___

500, 505, 510

500, 550, 600

600, 605, 610 ✓

600, 625, 650
Andeep counts backwards in multiples of 25. What number has he missed from his count?

'500' ✓

When you count in multiples of 20...

...the ones digit is always 2, 4, 6, 8 or 0

...the tens digit is always 2, 4, 6, 8 or 0 ✓

...the ones digit is always 5 or 0

...the tens digit is always 5 or 0
Which of these numbers are multiples of 25?

150 ✓

355

520

775 ✓
Look at the number line. The count is in multiples of ______

'5' ✓
Look at the number line. The count is in multiples of ______

'20' ✓
Look at the number line. What are the three missing numbers?

500, 525, 550

550, 525, 500

600, 650, 700

600, 625, 650 ✓
The graph shows the number of children who went to the park over the weekend. If 150 children went on Saturday, how many children went on Sunday?

'550' ✓

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Scales are marked in different ways.
Counting in 20s, 50s or 25s can help identify missing numbers.
Knowing patterns can help you recognise whether numbers are multiples of 20, 25 or 50

Pupils may struggle to find missing numbers where they are given the start and end numbers only.

Draw attention to the patterns in the counts (e.g. 5 and 0 of counting in 5s and 50s) so that pupils recognise multiples of numbers.

Multiple - A multiple is the result of multiplying a number by another whole number.
Pattern - A pattern is when objects or numbers are arranged following a rule. A pattern is a repeated set of numbers, shapes or objects.