Free worksheets · Kindergarten
Teen Numbers: Count a Ten and Extra Ones Worksheet
Look at a tall stack of ten cubes and a shorter stack of ones, write 1 in tens and the ones count, then write the whole teen number.
Free printable
Teen Numbers: Count a Ten and Extra Ones
4 questions, one page, US Letter. Print it and do it on paper.
On the sheet: The tall stack is a ten: write 1 in tens. Count the ones and write that in ones. Write the whole number in the big box.
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About this worksheet
Each problem shows a stack of 10 cubes and a second stack of loose ones. The child writes 1 in the tens box, counts the ones, and writes the teen number, from 11 to 19, in the big box.
Teen numbers are one ten and some ones, though their names do not say so: "fourteen" puts the 4 first. Seeing the ten as one stack helps a child see why 14 is written 1, 4.
A worked example
A stack of 10 cubes and a stack of 8 cubes.
- The tall stack is one ten. Write 1 in the tens box.
- Count the cubes in the short stack: 8. Write 8 in the ones box.
- Put them together: 1 ten and 8 ones is 18.
- Write 18 in the big box.
Answer: 1 ten, 8 ones: 18
The common mistake
What it looks like: Writing 10 in the tens box, or writing the number backward, like 81 for eighteen.
Why it happens: The child counts the cubes in the tall stack, or writes the digits in the order they hear them: "eight-teen."
How to fix it: Remind them the tens box counts stacks, not cubes. Then write the tens digit first, every time.
Ten minutes a day, on paper. We plan what comes next.
A printed page and a pencil. No screen, no login for your child. Snap a photo when they’re done: AI scores it, and what they missed comes back on the sheets that follow.
- Mon Teen Numbers: Count a Ten and Extra Ones
- Tue What they missed, back again
- Wed The next step, when they’re ready
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