step 1 of 6
You have snapped ten ones together into one ten before. Omar does that with pretzels. Every bag holds ten pretzels, counted and zipped shut.
One full bag of pretzels is the same as what?
A Hundred Is Ten Tens
Understand that 100 can be thought of as a bundle of ten tens, called a 'hundred'
What a learner can do afterwards
- Explain that 10 groups of 10 ones make 100
- Bundle ten tens sticks into one hundred and describe what happened
- Represent 100 using base-ten blocks showing 10 tens
1 · Read
You already know that ten ones bundled together make one ten. Now bundle again. Take ten of those ten-bundles and put them all together. That big bundle gets a new name: a hundred.
Tap to fill the grid, one at a time: 10 rows of 10.
Try it together
Omar has ten bags. Each bag has ten pretzels. He pours all ten bags into one big bowl. Now the bowl has one hundred pretzels, because ten tens make a hundred.
Good to know
When you write 100, the 1 sits in the hundreds spot. The two zeros mean there are no extra tens and no extra ones left over, just one full hundred.
Ten tens bundled together make one hundred, which is why 100 has a 1 in the hundreds place and two zeros after it.
2 · Watch
3 · Play
Take it off screen
Print a worksheetA4 with an answer key page for grown-ups. No screen, no internet.
Where it sits
Where this leads
Jobs that lean on this skill. Follow one to see everything it is built on.
Then practise
18 questions wait behind this lesson, each with its answer explained. Every answer feeds the sky: stars light as they are learned, and dim when it is time to come back.