Number Bonds Worksheets
Generate printable number bonds (part-part-whole) worksheets for kindergarten through 2nd grade. Students practice decomposing numbers by filling in missing parts of number bond diagrams. Number bonds build the conceptual foundation for addition and subtraction — pair them with our Addition Worksheets and Subtraction Worksheets for a complete fluency program.
Worksheet Settings
Preview
What Are Number Bonds?
A number bond is a simple diagram that shows how a number can be broken into two parts. A large circle at the top shows the whole, and two smaller circles below show the two parts. Lines connect the whole to each part. Students practice by filling in the missing value — the whole or one of the parts.
Number bonds build a deep understanding of part-part-whole relationships, which is the conceptual foundation for both addition and subtraction. They are commonly introduced in kindergarten and first grade.
How to Use This Generator
- Choose Specific Whole Number to practice all decompositions of one number (e.g., all ways to make 10), or Number Range to generate a mixed set of problems.
- Select which part is missing: the whole, always the left part, always the right part, or Random to mix it up.
- Set problems per page and toggle the answer key and name lines, then click Generate Worksheet.
- Review the preview and click Download PDF.
Frequently Asked Questions
What grade level are number bonds appropriate for?
Number bonds are typically introduced in kindergarten and first grade, with the number 10 being the most important. They remain useful through 2nd grade when students are building fluency with facts within 20.
Why is "Make 10" so important?
Knowing all the ways to compose and decompose 10 (1+9, 2+8, 3+7, etc.) is one of the most foundational skills in early math. It underpins mental addition strategies used for the rest of elementary school.
How many problems per page should I use?
8–12 problems per page gives students enough space to work comfortably. Use 20 for quicker diagnostic checks or with smaller whole numbers.
