Counting to 100 by ones and tens (kindergarten) · lesson

What comes next

💡 Each number we say is one more than the one before.

We count 1, 2, 3, 4. Each new number is one more.

After 9 comes 10. After 19 comes 20. After 29 comes 30. A new ten starts.

🧠 How to think about it

Say the last number out loud. Then say the next one. After 13, say 14.

🏡 Try it at home

Count the stairs as you walk up. Then start at 5 and count to the top.

💡 Counting by tens is a fast way to get to 100.

Ten, twenty, thirty, forty, fifty. Each jump adds a whole ten.

Sixty, seventy, eighty, ninety, one hundred. Ten tens make 100.

🧠 How to think about it

Look at the tens rods. Touch each rod and say 10, 20, 30. The last word is the total.

🏡 Try it at home

Make piles of 10 dry beans or pasta. Count the piles by tens: 10, 20, 30.

💡 You can start counting from any number, not just 1.

To count on from 47, say the next numbers: 48, 49, 50.

Do not count the number you start on. Hold up a finger for each new number.

🧠 How to think about it

Start at 5. Hop 3. Say 6, 7, 8 and lift a finger each time. Three fingers up means stop at 8.

🏡 Try it at home

Pick a number on a clock or a page. Count on 3 from it together.

💡 The missing number fits in the gap between two numbers.

Look at 15, 16, ?, 18. Count from 15. What comes after 16? It is 17.

Teen numbers start with 1. We write 17, not 71.

🧠 How to think about it

Say the numbers out loud. Say "hmm" at the gap. Then say the number that fits.

🏡 Try it at home

Say three numbers in a row and skip one, like 6, 7, 9. Your child names the missing one.