Use known facts to add and subtract multiples of 100 within 1000
Lesson details
Learning outcome
I can add and subtract multiples of 100
Key learning points
- Known facts can be used to help calculate with multiples of a hundred.
- If we know that 2 ones plus 4 ones equals 6 ones we know that 2 100s plus 4 100s equals 6 100s.
- Number facts to 10 can help us to add and subtract multiples of a hundred.
Keywords
Known facts - A known fact is something that you already know and can use to help you.
Multiple - A multiple is the result of multiplying a number by another whole number.
Common misconception
Pupils may find it difficult to connect calculating with hundreds with known facts.
Pupils need to be encouraged to 'unitise' hundreds to make calculation easier, seeing 500 as 5 lots of one hundred.
Teacher tip
Pupils may need base ten blocks ('hundreds') to support their thinking and help them connect calculating with hundreds with known facts (e.g. 3 + 4 = 7 so 300 + 400 = 700). Number lines and bar models are also useful representations for pupils.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.What is 40 + 40?
Q2.100 − 40 =
Q3.What is the sum of 30, 30 and 10?
Q4.What is the value of the missing part in the bar model?
Q5.What is the missing number? + 10 = 120
Q6.Which pair of numbers do not add up to equal 90?
Assessment exit quiz
6 Questions
Q1.Which of these numbers are multiples of a hundred?
Q2.Which known fact could you use to help you calculate 500 + 300?
Q3.What is 100 less than 600?
Q4.Which pairs of numbers are equal to 600?
Q5.What is the value of the missing part in the bar model?
Q6.Which pairs of numbers could be used to complete the bar model?
To help you plan your 3 maths lesson on: Use known facts to add and subtract multiples of 100 within 1000, 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 add and subtract multiples of 100 within 1000, 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.