Solve problems by counting forwards and backwards in multiples of 2, 20, 5, 50 and 25
Lesson details
Learning outcome
I can solve problems by counting in multiples of 2, 20, 5, 50 and 25.
Key learning points
- 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
Keywords
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.
Common misconception
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.
Teacher tip
Pupils will need lots of practise counting in multiples of 2, 20, 5, 50 and 25 before the lesson. Encourage pupils to use 'trial and improvement' as well as knowledge of multiples to find missing numbers when counting forwards and backwards.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.Which multiple of 20 comes next: 120, 140, 160, ?
Q2.Order the numbers so that the count is in the correct order, starting with the smallest.
Q3.What number is missing from the number track?
Q4.What number is missing from the number track?
Q5.What are the next three numbers in this count: 585, 590, 595, ___, ___, ___
Q6.Andeep counts backwards in multiples of 25. What number has he missed from his count?
Assessment exit quiz
6 Questions
Q1.When you count in multiples of 20...
Q2.Which of these numbers are multiples of 25?
Q3.Look at the number line. The count is in multiples of
Q4.Look at the number line. The count is in multiples of
Q5.Look at the number line. What are the three missing numbers?
Q6.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?
To help you plan your 3 maths lesson on: Solve problems by counting forwards and backwards in multiples of 2, 20, 5, 50 and 25, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 3 maths lesson on: Solve problems by counting forwards and backwards in multiples of 2, 20, 5, 50 and 25, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
We use learning cycles to break down learning into key concepts or ideas linked to the learning outcome. Each learning cycle features explanations with checks for understanding and practice tasks with feedback. All of this is found in our slide decks, ready for you to download and edit. The practice tasks are also available as printable worksheets and some lessons have additional materials with extra material you might need for teaching the lesson.
The assessment exit quiz will test your pupils' understanding of the key learning points.
Our video is a tool for planning, showing how other teachers might teach the lesson, offering helpful tips, modelled explanations and inspiration for your own delivery in the classroom. Plus, you can set it as homework or revision for pupils and keep their learning on track by sharing an online pupil version of this lesson.
Explore more key stage 2 maths lessons from the Representing 3-digit numbers, comparing and positioning on number lines unit, dive into the full primary maths curriculum, or learn more about lesson planning.