How it works
- Choose the range: up to 10 and up to 20 for beginners, up to 100, 1,000 or 10,000 later on.
- Choose regrouping (carrying) or not, and whether the child finds the sum or a missing number.
- Press New sheet for different problems and Print. The answers print on a second page.
From sums to 10 to four-digit numbers
“Up to 20” means that every sum is 20 or less, so 13 + 6 can appear but 15 + 9 cannot. Sums up to 10 and 20 build the number facts children need for everything else; sums up to 100 and 1,000 practice place value and regrouping.
With or without regrouping
With regrouping, at least one column adds up to ten or more, as in 47 + 38. Without regrouping, no column does, as in 42 + 35. Starting without and then mixing both is the usual order in school.
Missing addends
Problems like 7 + __ = 12 show that addition and subtraction are two sides of the same fact. Choose “Missing number”, or “Mixed” to combine both kinds on one sheet.
Questions and answers
How many problems are on a sheet?
You choose: 12, 20, 30 or 40. With fewer problems the numbers print bigger, which helps younger children.
What is regrouping?
It is the American word for carrying: when the ones add up to ten or more, a ten moves to the tens column. In 47 + 38, 7 + 8 = 15, so you write 5 and regroup 1 ten.
Can I print the same sheet again later?
Yes. Type the code printed at the bottom of the sheet into the code box on this page to get the same problems and the answer key.
Is there a version for column addition?
Yes, the column worksheet lines the numbers up on squared paper, with two to five digits.
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