Double 2-digit numbers and record as multiplications where one of the factors is 2
Lesson details
Learning outcome
I can double 2-digit numbers and record as multiplications where one of the factors is 2
Key learning points
- Doubles facts to 5 can help to double 2-digit numbers.
- To double, partition the 2-digit number, double the ones digit then the tens digit and recombine.
- Doubling can be written as a multiplication equation where one of the factors is 2
- When one of the factors is 2, the product is double the other factor.
Keywords
Double/ Doubling - To become twice as many / to multiply by two.
Partition - The act of splitting an object or value down into smaller parts.
Factor - A factor is a number which exactly divides another whole number.
Product - A product is the result of two or more numbers multiplied together.
Common misconception
Children may not be able to see doubling where the numbers cannot be seen e.g. money contexts.
Children should be encouraged to represent the numbers using resources to support them in visualising the problem until they are confident to use mental strategies to solve.
Teacher tip
Use of manipulatives are used within this lesson to visualise the process of doubling, but the aim is for children to work towards recalling these facts and strategies mentally.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.Complete the sentence. We can partition 6 into __________
Q2.Complete the sentence. We can partition 19 into __________
Q3.Which doubling fact has been represented on this bar model?
Q4.Double 3 is
Q5.Double 4 is
Q6.Which of these equations could I use doubling knowledge to solve?
Assessment exit quiz
6 Questions
Q1.Which double is being shown here?
Q2.Double 4 tens is ___
Q3.Double 10 is
Q4.Double 11 is
Q5.Which of these equations could I use doubling knowledge to solve?
Q6.What is 13 × 2 = ?
To help you plan your 2 maths lesson on: Double 2-digit numbers and record as multiplications where one of the factors is 2, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 2 maths lesson on: Double 2-digit numbers and record as multiplications where one of the factors is 2, 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 1 maths lessons from the Multiplying by 2, doubling and halving (factors and products) unit, dive into the full primary maths curriculum, or learn more about lesson planning.