Use known facts to add and subtract to and from multiples of 100
I can add to and subtract from multiples of 100.
Use known facts to add and subtract to and from multiples of 100
I can add to and subtract from multiples of 100.
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Lesson details
Key learning points
- When you add a one-digit number and a multiple of 100, only the 1s digit changes.
- When you subtract a one-digit number from a multiple of 100, the 100s, 10s and 1s digits change.
- When you add a 10s number and a multiple of 100, only the 10s digit changes.
- When you subtract a 10s number from a multiple of 100, the 100s and 10s digits change.
Keywords
Multiple - A multiple is the result of multiplying a number by another whole number.
Common misconception
Pupils may need help using number pairs that total 10 to support their thinking in this lesson.
Make explicit connections between number pairs that total ten and the learning (e.g. 10 - 3 = 7 so 100 - 7 = 93 and 100 - 30 = 70).
To help you plan your year 3 maths lesson on: Use known facts to add and subtract to and from multiples of 100, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 3 maths lesson on: Use known facts to add and subtract to and from multiples of 100, 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.
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Explore more key stage 2 maths lessons from the Representing 3-digit numbers, comparing and positioning on number lines unit, dive into the full secondary maths curriculum, or learn more about lesson planning.
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Lesson video
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Starter quiz
6 Questions
Exit quiz
6 Questions
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