Numbers to 20
Welcome back, math friend! Last year you learned to count up to 10. Now we are going further — all the way up to 20. Numbers help us tell how many cookies are on the plate, how many friends are at the table or how many steps to climb to your room.
Numbers we already know
You know these from before:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Zero means nothing — empty hands. Ten is when all your fingers are up.
New numbers we will learn
After ten come the new ones. Listen how they sound:
11 eleven, 12 twelve, 13 thirteen, 14 fourteen, 15 fifteen,
16 sixteen, 17 seventeen, 18 eighteen, 19 nineteen, 20 twenty
Some of them sound a bit like 3, 4, 5… plus the word "teen". That is on purpose — these numbers are made of one ten and a few more.
Why numbers to 20
Numbers to 20 are everywhere. The clock shows minutes up to 20. Your shoe size is around there. A small pizza has up to 8 slices, and a bigger one up to 16. By the end of first grade you will read and write any number from 0 to 20 without thinking twice.
What you will learn here
- Digits and numbers — what is a digit and what is a number
- Tens and ones — how 14 is one ten and four ones
- Worked examples — short solved examples
- For parents — tips for grown-ups at home
When you are ready, try the exercise Number line and place a number anywhere from 0 to 20.