Crossing the tens boundary counting forwards
I can count forwards from 1-100, crossing the tens boundary
Crossing the tens boundary counting forwards
I can count forwards from 1-100, crossing the tens boundary
Lesson details
Key learning points
- The numbers from 0 to 100 have patterns that can help us to count across the tens boundary.
- They are arranged differently on a number track and on a one hundred square.
- We can count the numbers in two ways.
- When a whole number ends in a 9, it is always followed by a decade number.
Common misconception
Confusion between the number after 29, 39 etc. so saying 29,20 or twenty-none, twenty -ten.
Explicitly look at the numbers that follow a number ending in 9 using stem sentence to support.
Keywords
Tens boundary - This is where the pattern of counting changes at the start of the number to show a new decade has started.
Decade number - This is a multiples of ten which marks the tens boundary where the pattern of counting changes.
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Video
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Starter quiz
6 Questions
3 tens 5
5 tens 3
2 tens 8
8 tens 2
Exit quiz
6 Questions
40
50
60
