Use a number line to position and estimate the numbers 20-99
I can position the numbers 20-99 on a number line including in the context of measures.
Use a number line to position and estimate the numbers 20-99
I can position the numbers 20-99 on a number line including in the context of measures.
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Lesson details
Key learning points
- We can use the intervals on a number line to help us find and position other numbers.
- The multiples of ten can help us find which decade a number is in.
- The midpoint we refer to is halfway between each multiple of ten.
- The midpoint we refer to has a ones digit of five.
- The midpoint can help us position numbers that are not close to a multiple of ten.
Keywords
Midpoint - The middle of something. The point halfway along.
Previous - Going before in time or order.
Common misconception
When finding the previous multiple of ten, children may misapply what they know about counting in tens. For example, they may think 30 is before 40, so think 30 is the multiple of ten before 45
Make deliberate errors to discuss and encourage children to visualise, then label, their own number lines marked in tens.
To help you plan your year 2 maths lesson on: Use a number line to position and estimate the numbers 20-99, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 2 maths lesson on: Use a number line to position and estimate the numbers 20-99, 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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The assessment exit quiz will test your pupils' understanding of the key learning points.
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Explore more key stage 1 maths lessons from the Counting and representing the numbers 20 to 99 unit, dive into the full secondary maths curriculum, or learn more about lesson planning.
Licence
Lesson video
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Starter quiz
6 Questions
Exit quiz
6 Questions
