Add 3 Numbers Worksheets for 1st Grade
Add three single-digit numbers together. 15 free printable worksheets, each with an answer key.
Save to PinterestFree Add 3 Numbers Worksheets
Click a worksheet to open the PDF, or grab the matching answer key. Every sheet prints on one page.
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Add 3 Numbers: what children learn
Adding three numbers at once introduces the idea that addition can be done in any order or grouping (e.g., adding the easiest pair first) — an early, informal look at the associative property.
Add 3 Numbers: worked example
2 + 5 + 8 = 15
Add any two first — 2 + 8 = 10 is an easy pair — then add the last number: 10 + 5 = 15.
Add 3 Numbers: a common mistake to watch for
Kids often add strictly left to right even when a different pairing would be much easier — it's worth explicitly showing that addition order doesn't change the answer.
Add 3 Numbers: how to help at home or in class
Roll three dice and ask your child to look for a pair that is easy to join first, such as two numbers that make ten or a double. Add that pair, then the last number. Compare orders: if you add the numbers in a different order, do you get the same total? Let your child test it. When your child scans for friendly pairs before adding and answers confidently, try adding with sums up to 20.
What is on these Add 3 Numbers worksheets
This set has 15 different worksheets for 1st grade, with 23 questions on each and a matching answer key for every sheet. The instruction printed on each worksheet is: “Add all three numbers and write the total.”
Example questions like the ones on these worksheets, with their answers:
- 8 + 6 + 2 =16
- 1 + 8 + 6 =15
- 9 + 1 + 2 =12
- 1 + 9 + 4 =14
- 2 + 1 + 4 =7
- 6 + 2 + 5 =13
- 5 + 4 + 2 =11
- 9 + 6 + 2 =17
Every answer on every sheet is checked by a separate program before the worksheet is published. How we check answers