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Number bonds worksheets

Two numbers that make ten. Print a sheet with its answer key, or answer the same questions on screen.

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Number bonds

Sheet code: 17G0-0000-004T

Up to 10 · Number bonds

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  1. 1.6 + = 10
  2. 2.1 + = 10
  3. 3.5 + = 10
  4. 4.9 + = 10
  5. 5.3 + = 10
  6. 6.7 + = 10
  7. 7.4 + = 10
  8. 8.2 + = 10
  9. 9.8 + = 10
  10. 10.3 + = 10
  11. 11.2 + = 10
  12. 12.6 + = 10
  13. 13.5 + = 10
  14. 14.7 + = 10
  15. 15.9 + = 10
  16. 16.4 + = 10
  17. 17.1 + = 10
  18. 18.6 + = 10
  19. 19.8 + = 10
  20. 20.3 + = 10

Made at lovetocalc.com, where every sheet comes with its answer key and can be practised on screen.

Teachers: choose the numbers and print a new sheet in a click. Scan the code.

The same sheet and key again: enter the sheet code at lovetocalc.com/en/shortcuts.

lovetocalc.com

Answer key: Number bonds

Sheet code: 17G0-0000-004T

Up to 10 · Number bonds

  1. 1.4
  2. 2.9
  3. 3.5
  4. 4.1
  5. 5.7
  6. 6.3
  7. 7.6
  8. 8.8
  9. 9.2
  10. 10.7
  11. 11.8
  12. 12.4
  13. 13.5
  14. 14.3
  15. 15.1
  16. 16.6
  17. 17.9
  18. 18.4
  19. 19.2
  20. 20.7

Made at lovetocalc.com, where every sheet comes with its answer key and can be practised on screen.

Teachers: choose the numbers and print a new sheet in a click. Scan the code.

The same sheet and key again: enter the sheet code at lovetocalc.com/en/shortcuts.

lovetocalc.com

How it works

The bonds to ten

There are nine pairs: 1 and 9, 2 and 8, 3 and 7, 4 and 6, 5 and 5, and the same pairs the other way round. A sheet of twenty questions asks each pair more than once, which is the point: the pairs should be known, not counted out. With a total of 100 they are the bonds to a hundred, 37 + __ = 100, and with 1000 the bonds to a thousand.

Why they matter

8 + 5 is easiest as 8 + 2 + 3: up to ten first, then the rest. That first step, knowing that 8 needs 2 to make 10, is a number bond. A child who knows the pairs can cross a ten without counting on their fingers, in addition and backwards in subtraction.

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The same choices are on the addition worksheets.

Last reviewed October 27, 2026 ·How pages are reviewed

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