Free worksheets · Grade 1
10 More Worksheet
Add 10 to a two-digit number: only the tens digit goes up, by 1.
Free printable
10 More
22 questions, one page, US Letter. Print it and do it on paper.
On the sheet: Add one ten. The tens digit goes up by 1.
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About this worksheet
Adding 10 to 18 doesn't need counting on ten times. One more ten makes the tens digit go up by 1, and the ones stay the same: 18 + 10 = 28.
It is the first place-value shortcut a child learns, and it leads straight to adding 20, 30 and any multiple of ten.
A worked example
18 + 10
- 18 has 1 ten and 8 ones.
- Adding 10 makes it 2 tens.
- The ones stay 8: 28.
Answer: 18 + 10 = 28
The common mistake
What it looks like: Writing 19 for 18 + 10, or changing the ones digit.
Why it happens: The child adds 1 to the ones out of habit, the same way they count on.
How to fix it: Point to the tens digit and say "one more ten." Only that digit changes; cover the ones with a finger to see it.
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 10 More
- Tue What they missed, back again
- Wed The next step, when they’re ready
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