Numbers up to 100
Primary 1 · Mathematics
Numbers up to 100
Lesson 3 of 7
12 min
Let's begin
At break the whole class plays a counting game.
The teacher claps. Everyone counts together, louder and louder.
They want to reach 100 before the bell rings.
Today you will count all the way to 100.
Write the numbers in rows of ten.
Row one is 1 to 10. Row two is 11 to 20.
Each row ends with a full bundle. Then a new row starts.
Count on out loud: 21 to 30. Then 31 to 40.
Keep going, row by row, to 99.
Careful! 100 does not come straight after 90.
First you must say 91, 92, 93, 94, 95, 96, 97, 98, 99.
Then comes 100.
The end of a row is a corner. That is where children slip.
Say each corner out loud: 29 then 30.
49 then 50. 69 then 70. 89 then 90.
Say them again. Soon the corners will feel easy.
Take ten small bags. Put ten bottle caps in each bag.
Now count the bags, not the caps.
Say it out loud: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100.
You touched only 10 bags. You said 100.
| Bundles of ten | You say |
|---|---|
| 1 | 10 |
| 2 | 20 |
| 3 | 30 |
| 4 | 40 |
| 5 | 50 |
| 6 | 60 |
| 7 | 70 |
| 8 | 80 |
| 9 | 90 |
| 10 | 100 |
100 is ten tens.
Ten full bundles make one hundred. Say it again: 100 is ten tens.
Tip
Every row ends in a full bundle
Stuck at 69? Tie the bundle. Say 70. Start a new row.
Count with a friend. One of you says the tens. One says the ones.
Sing your way from 1 to 100.
Say each answer out loud, then tap Show answer to check.
Count on from 68. Say the next three numbers.
Answer: 69, 70, 71. At 69 you tie a new bundle.
Count in tens from 40. Say the next three.
Answer: 50, 60, 70. Each jump adds one whole bundle.
How many tens make 100?
Answer: 10 tens. 100 is ten full bundles.
Count on from 96 up to 100.
Answer: 97, 98, 99, 100. 99 comes before 100.
Take beans. Make 8 groups of ten.
Answer: 10, 20, 30, 40, 50, 60, 70, 80. You have 80 beans.
What you learned today
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