Crossing the tens boundary counting backwards
I can count backwards within 100, crossing the tens boundary.
Crossing the tens boundary counting backwards
I can count backwards within 100, crossing the tens boundary.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- The numbers from 0 to 100 have patterns that can help us to count backwards across the tens boundary.
Keywords
Tens boundary - This is where the pattern of counting changes at the start of the number to show a new decade has started.
Cross the tens boundary - The point at which the counting moves from one decade into another.
Decade number - This is a multiple of ten which mark the tens boundary where the pattern of counting changes.
Common misconception
Confusion regarding the number before the decade numbers, e.g. saying 30, 39
Explicitly look at the patterns in numbers that precede a decade number and discuss errors.
To help you plan your year 1 maths lesson on: Crossing the tens boundary counting backwards, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 1 maths lesson on: Crossing the tens boundary counting backwards, 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 Pattern in counting from 20 to 100 unit, dive into the full secondary maths curriculum, or learn more about lesson planning.
Licence
Starter quiz
6 Questions
100
30
50

Exit quiz
6 Questions

49
59
69