New
New
Year 3

Count forwards and backwards in multiples of 2, 20, 5, 50 and 25

I can count forwards and backwards in 2s, 20s, 5s, 50s and 25s.

New
New
Year 3

Count forwards and backwards in multiples of 2, 20, 5, 50 and 25

I can count forwards and backwards in 2s, 20s, 5s, 50s and 25s.

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Lesson details

Key learning points

  1. If you can count in 2s, you can count in 20s. The 1s or 10s digit follows the pattern of 2, 4, 6, 8 and 0
  2. If you can count in 5s, you can count in 50s. The 1s or 10s digit follows the pattern of 5 and 0
  3. When you count up in 25s, the 10s and 1s digits are always 25, 50, 75 or 0

Common misconception

Pupils may make mistakes with counting, particularly when crossing a 100s boundary.

Encourage pupils to use the pattern to help them count accurately, using this to predict the next number in the count.

Keywords

  • Multiple - A multiple is the result of multiplying a number by another whole number.

  • Pattern - A pattern is a repeated set of numbers, shapes or objects.

Encourage pupils to count out loud as much as possible. Base ten block representations may also be helpful for pupils to represent numbers as they say the count.
Teacher tip

Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

Video

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6 Questions

Q1.
What number comes next: 30, 35, 40, ?
Correct Answer: 45, forty five
Q2.
What number comes next: 20, 22, 24, ?
Correct Answer: 26, twenty six
Q3.
What number is missing from the number track?
An image in a quiz
Correct Answer: 85, eighty five
Q4.
What number is missing from the number track?
An image in a quiz
Correct Answer: 50, fifty
Q5.
Match up the equations.
Correct Answer:100 + 50 =,150

150

Correct Answer:300 − 50 = ,250

250

Correct Answer:250 + 50 =,300

300

Correct Answer:250 − 50 = ,200

200

Q6.
What number is subtracted from 420 to equal 380? Use the number line representation to help you.
An image in a quiz
Correct Answer: 40, forty

6 Questions

Q1.
Which multiple of 20 comes next: 240, 260, 280, ?
Correct Answer: 300, three hundred
Q2.
Which numbers are multiples of 25?
Correct answer: 125
Correct answer: 250
255
Correct answer: 375
Q3.
What number is missing from the number track?
An image in a quiz
Correct Answer: 400, four hundred
Q4.
What number is missing from the number track?
An image in a quiz
Correct Answer: 200, two hundred
Q5.
Sofia counts backwards in multiples of 25 from 325. What are the next three numbers she will say?
350, 375, 400
325, 300, 250
Correct answer: 300, 275, 250
300, 250, 200
Q6.
Andeep counts backwards in multiples of 20. What number has he missed from his count?
An image in a quiz
Correct Answer: 480, four hundred and eighty