Starter quiz
- Laura is counting forwards in tens from 20. Which are the next numbers she will say?
- 10, 0.
- 20, 40, 50.
- 30, 40, 50. ✓
-
- I am counting backwards in tens from 40. Which number will I say next?
- 50
- 30 ✓
- 20
-
- Which of these counting sequences is correct when counting forwards in tens?
- 10, 20, 30, 50.
- 20, 30, 40. ✓
- 50, 40, 30.
-
- Which of these counting sequences is correct when counting backwards in tens?
- 50, 40, 30, 10, 0.
- 40, 30, 20, 10, 0. ✓
- 50, 40, 20, 10.
-
- Put these decade numbers in the order you would say them when counting forwards.
- 1⇔20
- 2⇔30
- 3⇔40
- Put these decade numbers in the order you would say them when counting backwards.
- 1⇔40
- 2⇔30
- 3⇔20
Exit quiz
- I am counting forwards in tens from 90. What is the next number I will say?
- 20
- 18
- 100 ✓
-
- I am counting forwards in tens to 100. Which of the following is correct?
Andeep
Jacob
Izzy ✓
- I am counting backwards in tens from 60. What is the next number I will say?
- 15
- 50 ✓
- 70
-
- When counting backwards in tens, which of the following is correct?
Andeep ✓
Izzy
Sam
- Put the decade numbers in the order you would say them if counting forwards.
- 1⇔70
- 2⇔80
- 3⇔90
- 4⇔100
- Put the decade numbers in the correct order if you were counting them backwards.
- 1⇔100
- 2⇔90
- 3⇔80
- 4⇔70
Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- Decade numbers are used when counting forwards and backwards in tens.
- You can start counting from any decade number.
- When you count forwards, the numbers are greater than the starting number.
- When you count backwards, the numbers are smaller than the starting number.
Common misconception
Confusion between teen and decade numbers, e.g. 19 and 90, leading to errors in counting 80, 90, 20
Regular identification and discussion of common errors with opportunities to correct them within this lesson can be replicated beyond it.
Keywords
Number names 60 - 100 - e.g. "sixty" corresponding to 60
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