Free printable practice
Number Bonds 16 20 Practice Activities
Printable maths drill worksheets help children practise number bonds for totals 16, 17, 18, 19 and 20 with confident recall.
Practice that builds confidence
What children practise
These Number Bonds 16–20 practice activities help primary class children strengthen addition facts by finding pairs of numbers that make each total from 16 to 20. Children practise seeing part-part-whole relationships instead of counting every sum from the beginning.
The printable worksheets include focused drills for missing addends, matching pairs, complete-the-bond tasks and quick fact practice. They are useful for revising addition facts, building mental maths fluency and preparing for subtraction connections.
Number bonds are pairs of numbers that combine to make a given total. In this set, children work with totals 16, 17, 18, 19 and 20, such as 9 + 7 = 16, 8 + 9 = 17, 10 + 8 = 18, 14 + 5 = 19 and 11 + 9 = 20. The focus is not only on writing answers, but on recognising how a whole can be split into two parts.
Building from known facts
These worksheets sit after easier addition facts and help children extend familiar bonds to larger totals. A child who knows 6 + 4 = 10 can reason that 16 + 4 is not needed here, but 6 + 10 = 16 or 9 + 7 = 16 may be connected to making ten first. Activities may ask for the missing part, the matching partner or the full addition sentence, so children meet the same fact in different forms.
A simple parent routine
At home, choose one total for the day. Say, “Today we are making 18,” and ask your child to list pairs aloud before writing them: 0 and 18, 1 and 17, 2 and 16, and so on if appropriate for the worksheet. Use buttons, beads or sketch circles to show the two parts. Finish by covering one number in a bond and asking, “What is missing?” This keeps the work practical before it becomes a speed drill.
Classroom use for teachers
Teachers can use these printables for morning maths practice, small-group fluency work, revision after an addition lesson or as independent work at maths centers. They also work well for quick checks: if a child can find missing partners for 16–20 without counting one by one, they are developing useful recall for later subtraction, regrouping and mental calculation.
Common errors to watch for
Some children reverse the total and a part, writing three numbers without checking whether the two parts actually make the whole. Others rely on finger counting and lose track near 19 or 20. Watch for repeated pairs too; 7 + 9 and 9 + 7 show the same bond, but children should understand the commutative idea rather than treat it as a completely new fact.
Free printable PDF download
Use this number bonds 16 20 worksheet page to preview the activity, print it, or download it as a PDF for quick practice. It works well for homework, homeschool lessons, tutoring, morning work, revision, and classroom centers.
Answers and answer key support
After the child completes the worksheet independently, parents and teachers can use the answer support or answer key information to check the work, review mistakes, and choose the next practice step.
Why iBloom worksheets help
iBloom worksheets give focused practice with just the 16–20 range, so children are not distracted by unrelated sums. A helpful strategy is: “Think of the whole, say one part, count on or think back to find the missing part, then check by adding both parts.” This child-friendly routine builds accuracy, confidence and flexible number sense.
Helpful answers
Frequently asked questions
What are number bonds for 16 to 20?
They are pairs of numbers that add up to each total from 16 through 20, such as 8 and 8 for 16, 9 and 8 for 17, or 11 and 9 for 20.
How should my child use these worksheets at home?
Start with one total, talk through a few pairs using objects or drawings, then let your child complete the worksheet. Ask them to check each bond by adding the two parts together.
Are these worksheets only for addition?
They mainly practise addition facts, but number bonds also support subtraction because children learn how a whole can be separated into missing parts.
What if my child counts every bond on fingers?
Use visual groups first, especially making ten and then adding the extra amount. Gradually ask your child to recall familiar pairs before counting.
Can teachers use these for quick maths drills?
Yes. The focused 16–20 range makes them suitable for warm-ups, revision, small-group fluency practice or short independent tasks in class.
Is this number bonds 16 20 worksheet free?
Yes. You can preview it for free and use the printable worksheet for home or classroom practice.
Can I download this number bonds 16 20 worksheet as a PDF?
Yes. Use the worksheet download option to save a printable PDF, or print the worksheet directly from the page.
Does this number bonds 16 20 worksheet include answers or an answer key?
When the activity has fixed answers, iBloom includes answer support so parents and teachers can check the completed worksheet.