Grade 1 · Year 2 · Class 1 · ages 6–7 · Addition
Number bonds and missing numbers: Grade 1 practice
Finding the missing number that completes an addition fact. Eight questions at a time, instant feedback and a mastery score from 0 to 100.
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Right answers raise your mastery score (more on harder questions) and wrong ones lower it a little. Your best score is saved on this device, and in your account if you log in.
The idea in one minute
Number bonds to 10 (1 and 9, 2 and 8, 3 and 7) are the most useful facts to know by heart.
Try these on paper first
One question at each level. Tap a question to see the answer.
Easy + 7 = 7
Answer: 0
Medium 10 + = 10
Answer: 0
Challenge 11 + = 18
Answer: 7
More ways to practise number bonds and missing numbers
- Printable number bonds and missing numbers worksheet with an answer key (new questions every time)
- All Grade 1 practice · Addition worksheets
Related skills
- Addition within 10 (Grade 1)
- Addition within 20 (Grade 1)
- Adding within 20 word problems (Grade 1)
- 2-digit addition (Grade 2)
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FAQ
Number bonds and missing numbers: questions
What grade is number bonds and missing numbers?
It is usually taught in Grade 1 (Year 2 in England, Class 1 in India, ages 6–7), though schools and countries differ. Try the grade above or below if it feels too hard or too easy.
What does a number bonds and missing numbers question look like?
For example: "10 + … = 10" The answer is 0. Number bonds to 10 (1 and 9, 2 and 8, 3 and 7) are the most useful facts to know by heart.
What should I learn before and after number bonds and missing numbers?
Before it, try addition within 20 (Grade 1). After it, move on to adding within 20 word problems (Grade 1).
How can I get better at number bonds and missing numbers?
Number bonds to 10 (1 and 9, 2 and 8, 3 and 7) are the most useful facts to know by heart. Practise a little every day, read the hint after each wrong answer, and use the printable worksheet when you want to write it out.
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