Use known facts to solve problems involving partitioning numbers
Lesson details
Learning outcome
I can use known facts to help me solve partitioning problems.
Key learning points
- Multiples of ten that total one hundred can help with adding and subtracting 3-digit numbers.
- Doubles and near doubles can be helpful when adding multiples of ten together.
- Partitioning 100 into 10 tens and combining tens to make 100 can help with calculating.
Keywords
Double - Double means to become twice as many.
Multiple - A multiple is the result of multiplying a number by another whole number.
Common misconception
Pupils may struggle when adding near double multiples of ten and when crossing 100s boundaries.
Encourage pupils to use their known facts to support thinking and combine this with the use of base ten blocks, especially for crossing 100
Teacher tip
Pupils will find base ten blocks useful for this session. Encourage them to manipulate the blocks, partitioning 100 into 10 tens and redistributing by combining 10s to make 100
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.Match the numbers so that they are a pair that totals 10.
1
4
2
3
Q2.What is double 6?
Q3.What is ten more than 40?
Q4.120 + ___ = 150
Q5.What is value of the part missing from the bar model?
Q6.What is value of the part missing from the bar model?
Assessment exit quiz
6 Questions
Q1.Match the multiples of ten to their doubles.
60
80
100
120
Q2.What is double 80?
Q3.Complete the calculation: 60 + = 100
Q4.What number is missing from the bar model?
Q5.What number is missing from the bar model?
Q6.Which pair of numbers could not be used to complete the bar model?
To help you plan your 3 maths lesson on: Use known facts to solve problems involving partitioning numbers, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 3 maths lesson on: Use known facts to solve problems involving partitioning numbers, 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.