Add a 3-Digit and a 1-Digit Number Worksheets for 2nd Grade
Add a 3-digit number and a 1-digit number in columns. 15 free printable worksheets, each with an answer key.
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Click a worksheet to open the PDF, or grab the matching answer key. Every sheet prints on one page.
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Add a 3-Digit and a 1-Digit Number: what children learn
Adding a one-digit number to a three-digit number only changes the ones, unless the ones add to 10 or more and a ten (or even a hundred) is carried.
Add a 3-Digit and a 1-Digit Number: worked example
347 + 8 = 355
7 + 8 = 15 ones: write 5 and carry 1 ten. 4 + 1 = 5 tens. So 347 + 8 = 355.
Add a 3-Digit and a 1-Digit Number: a common mistake to watch for
Kids sometimes line the 1-digit number up under the hundreds instead of the ones.
Add a 3-Digit and a 1-Digit Number: how to help at home or in class
Write a three-digit number such as 596 on a card and flip a small number card to add. Teach the make-the-next-ten trick: 596 + 7 means 596 + 4 = 600, then 3 more. Watch how the tens and hundreds digits change when the ones pass 9. Practise a handful each day aloud, then confirm on paper. Your child is ready for adding two three-digit numbers when the trick comes quickly and the digits line up on paper.
What is on these Add a 3-Digit and a 1-Digit Number worksheets
This set has 15 different worksheets for 2nd grade, with 15 questions on each and a matching answer key for every sheet. The instruction printed on each worksheet is: “Add the numbers in columns and write the sum.”
Example questions like the ones on these worksheets, with their answers:
- 765 + 6 = 771771
- 583 + 9 = 592592
- 412 + 2 = 414414
- 967 + 9 = 976976
- 203 + 3 = 206206
- 554 + 6 = 560560
- 910 + 2 = 912912
- 601 + 3 = 604604
Every answer on every sheet is checked by a separate program before the worksheet is published. How we check answers