Number bonds worksheets

A number bond shows a whole number and the two parts that make it, like 10 split into 7 and 3. Number bonds to 10 are the base for mental addition and subtraction.

Download the free number bonds worksheet (PDF)

What’s on the worksheet

• 50 questions on number bonds, sized for US Letter paper
• 2 pages of questions plus an answer key on the last page
• Written for kindergarten and grade 1, matching Common Core K.OA.A.3, 1.OA.C.6
• Name and date lines at the top, and room to show the work

Preview the worksheet and answer key

Make a new number bonds worksheet

Need another page for extra practice, a retake or a second group in class? The free Mathify Kids test maker builds a fresh number bonds worksheet with different numbers every time. Choose Core, Standard or Challenge level, print it with its own answer key, or let your child take it on screen and see the score straight away.

Make a new version

Number bonds: a worked example (Find the missing part: whole 10, part 7)

How to use it at home and in class

At home

Use real objects first: split 10 buttons into two groups in as many ways as your child can find. Ten problems a day works better than a whole sheet at once. Mark them together with the answer key, then ask your child to explain one they got wrong: finding the mistake themselves is where the learning happens.

In class

Use the first row as a warm-up, a full page for independent practice, or five questions as an exit ticket. For a retake or a second group, make a new version with the test maker so every child gets different numbers.

Mistakes to watch for

• Adding the whole and the part (10 + 7) instead of finding what is missing.
• Treating number bonds as a separate topic rather than as addition and subtraction.

What to practice before and after number bonds

• Before: 3-digit subtraction. If this sheet is a struggle, go back a step.
• Learn it first: the number bonds lesson and the addition chart.