Numbers to 100
You already know all the numbers up to 20. Now we make the jump — all the way to 100. Don't worry, the trick is the same: every two-digit number is just a few full tens with some ones left over.
A road of bags
Imagine ten bags, each holding ten marbles. Put them in a row.
1 bag = 10
2 bags = 20
3 bags = 30
...
9 bags = 90
10 bags = 100
That is your road from 0 to 100. Every full bag adds another ten.
Two-digit numbers
When you see 47, look at it like this:
- the first digit (4) is the number of full bags — four tens (40),
- the second digit (7) is the loose marbles — seven ones.
Together: 40 + 7 = 47. We say "forty-seven".
Why first grade in some countries only
Numbers to 100 appear in first grade in the US, Germany and Spain. Slovakia and the Czech Republic save it for second grade. Either way, it is the same fun trick — just bigger numbers.
What you will learn here
- Tens to 100 — counting in full bags
- Reading numbers — saying any two-digit number
- Skip counting by 2, 5 and 10 — fast counting tricks
- For parents — tips for grown-ups
When you are ready, look at the calendar — the numbers 1 through 31 already give you plenty to practice with.