Worksheet skill
Addition worksheets
Practice addition facts or work with larger numbers. Choose the number range and regrouping options before you print.
Sample worksheet
Download the sample worksheet and answer key, or open the builder to change the settings.
Download sample PDF
Change the settings
Before starting: Count on and identify ones, tens, and hundreds before using column addition.
After this: Try subtraction to check each sum, then use larger place values.
Example questions
- 7 + 5 = ___
- 27 + 15 = ___
- 306 + 478 = ___
Settings in the builder
- number range
- regrouping
- vertical or horizontal layout
Worked example
27 + 15
Answer: 42
How to solve it
Add the ones: 7 + 5 = 12. Exchange ten ones for one ten. Then add 2 + 1 + 1 tens to get 4 tens and 2 ones.
Common mistakes
What to check
- starting in the wrong place value
- forgetting to regroup a ten
Ways to review the work
- 1
Use counters or a place-value sketch before asking for the standard algorithm.
- 2
Ask why ten ones can be exchanged for one ten without changing the sum.
Teaching content updated 2026-09-05. Read our accuracy standards.