Class 1 (ICSE) • MathematicsChapter 1: Numbers 1 to 20⭐ Topic 1
Numbers 1 to 20
Numbers from 1 to 20 help us count objects, and learning to write, read, and order them is an important first step in mathematics.
1
Know it
Step 1 of 3
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See the pattern
Step 2 of 3
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Try it out
Step 3 of 3
Fun picture
Try it now
Learn the idea step by step
1
Know it
We count objects one by one, saying the numbers 1, 2, 3, and so on, up to 20.
2
Quick revision
Remember these!
- Numbers 1 to 20 help us count objects.
- We count one by one, in order.
- Each number has a name and a written numeral.
- 5 is written for the word 'five'.
- Numbers can be arranged from smallest to largest.
- Ordering helps us know what comes before or after.
- Counting objects helps us learn numbers.
- We can count toys, fruits or fingers to practice.
Words to know
numbers 1 to 20