Adding 3 Numbers Worksheets — Grade 1
Adding three numbers teaches children to combine more than two addends at once — a great stretch for growing mathematicians. These free Grade 1 worksheets stack three numbers per problem, working within 20, so kids practise adding step by step down the column.
Create your Addition worksheet
Choose the options below and click 🔄 Regenerate for a brand-new set of problems — as many fresh worksheets as you like, no page reload. Then download the PDF or print it — with an answer key included.
Three-addend problems build flexible thinking, like spotting a pair that makes ten first. Every sheet is generated fresh with a matching answer key, ready to download as a PDF and print.
Example adding 3 numbers addition problems
Here are a few sample problems like the ones this worksheet generates (with answers). Click Regenerate above for a brand-new set every time.
- 8 + 1 + 7 = 16
- 2 + 2 + 5 = 9
- 7 + 1 + 1 = 9
- 7 + 1 + 7 = 15
- 3 + 1 + 7 = 11
- 8 + 7 + 7 = 22
- 8 + 9 + 7 = 24
- 4 + 6 + 6 = 16
- 7 + 1 + 8 = 16
- 6 + 1 + 8 = 15
How to use these worksheets
- Problems are set to 3 numbers — click Regenerate for a new set.
- Add the first two numbers, then add the third to the total.
- Look for pairs that make ten to add faster.
- Download the PDF (answer key included) and print.
Frequently asked questions
How do you add three numbers?
Add the first two numbers to get a subtotal, then add the third number to that subtotal.
Can children change the number of addends?
Yes — the "Numbers to add" option switches between 2, 3 and 4 addends.
Are these worksheets free?
Yes, free and unlimited to generate, download and print.