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.
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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.
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Lesson video
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Starter quiz
6 Questions
100
30
50
Exit quiz
6 Questions
49
59
69