1st grade two-digit addition worksheets

First graders add two-digit numbers without regrouping: ones with ones, tens with tens. Keeping the columns straight is the whole game at this stage, and the stacked layout makes it visible.

Free printable PDF worksheet, aligned to Common Core 1.NBT.C.4.

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The kind of problems you'll get

Add. Line up the tens and ones.

33 + 25 =
Answer: 58
70 + 16 =
18 + 21 =

Every print pulls a fresh set of problems at this level, so a make-up test or a second sibling never gets the same sheet.

What's on each sheet

Computation. Add. Line up the tens and ones. 9 questions per page.

Every version prints on US Letter or A4, with its answer key on the last page.

How to teach this

Check the setup before the math: are the ones sitting over the ones? Turning lined paper sideways keeps columns honest. Have your child touch each column as they add and say both little sums out loud.

Watch for: Kids add the tens first because we read left to right. Start at the ones so the carry has somewhere to go. Kids write 12 under the line when the ones make twelve. Write the 2 and carry the 1 ten.

Common questions about two-digit addition

Does the 1st grade version include carrying?: No. The 1st grade sheets are regrouping-free, so your child can focus on lining up ones and tens.
How is this different from fact practice?: Fact sheets build recall of single-digit sums. These sheets put that recall to work inside the column method used for years to come.

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Aligned to Common Core 1.NBT.C.4. Reviewed by the One more sheet curriculum team. Content version 123, updated July 2026.