Counting to and from 20
A clear starting point, worked steps and space to practise.
Start here
Counting tells us how many things there are. The last number you say is the total.
When a small group is already counted, keep that number in your head and count on. Do not count that group twice.
1 Work through these steps
- Touch or move one object at a time.
- Say one number for each object.
- Stop when every object has been counted.
- Say the last number again: that is how many.
2 Follow a worked example
There are 6 blocks. Add 2 more. How many blocks are there now?
Reduce diagram
Scroll across the diagram if needed. Keyboard users can focus the diagram and use the arrow keys.
- Start at 6 because those blocks are already counted.
- Count on two numbers: 7, 8.
- There are 8 blocks.
3 Try it yourself
Show each step on paper or open Working out. Then check the answer.
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You have counted 9 shells. Add 3 shells. How many are there?
Check answer 1
Answer: 12 shells
Count on three steps from 9: 10, 11, 12.
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Working out
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Check your understanding
Explain the worked example in your own words. Say why the method works, not just what the answer is.
Skills and explanation links
Key ideas taught here
- Counting tells us how many things there are. The last number you say is the total.
- When a small group is already counted, keep that number in your head and count on. Do not count that group twice.
Method and checking
For parents and teachers
- Ask your child to explain the method aloud before writing the answer.
- Use a real-life context at home, such as shopping, cooking, sport scores, maps or timetables.
- Praise clear working and checking, not only speed.
- Use counters, blocks, drawings and everyday objects before moving to written symbols.
Practise choosing a method from the information in the question. The examples here are Pi Leo Academy learning activities. Official NAPLAN testing takes place in Years 3, 5, 7 and 9; a topic appearing in these notes does not mean it is tested in NAPLAN.
These notes provide guided examples and practice; they do not certify completion of every curriculum requirement.