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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 485 · 40 questions
TalentJR

How to do it in your head (Make 10): Bonds to 10: 1 + 9, 2 + 8, 3 + 7, 4 + 6, 5 + 5. Bonds to 100: the ones make 10, and the tens make 9 (because the ones already gave one ten). If the number ends in 0, the tens make 10: 40 + 60 = 100.

NameDateTime takenScore ___ / 40
  1. 1.7 + ? = 10
  2. 2.5 + ? = 10
  3. 3.74 + ? = 100
  4. 4.62 + ? = 100
  5. 5.2 + ? = 10
  6. 6.8 + ? = 10
  7. 7.36 + ? = 100
  8. 8.20 + ? = 100
  9. 9.47 + ? = 100
  10. 10.3 + ? = 10
  11. 11.6 + ? = 10
  12. 12.32 + ? = 100
  13. 13.80 + ? = 100
  14. 14.42 + ? = 100
  15. 15.39 + ? = 100
  16. 16.4 + ? = 10
  17. 17.73 + ? = 100
  18. 18.41 + ? = 100
  19. 19.17 + ? = 100
  20. 20.1 + ? = 10
  21. 21.48 + ? = 100
  22. 22.70 + ? = 100
  23. 23.89 + ? = 100
  24. 24.9 + ? = 10
  25. 25.30 + ? = 100
  26. 26.27 + ? = 100
  27. 27.84 + ? = 100
  28. 28.79 + ? = 100
  29. 29.25 + ? = 100
  30. 30.37 + ? = 100
  31. 31.24 + ? = 100
  32. 32.55 + ? = 100
  33. 33.57 + ? = 100
  34. 34.75 + ? = 100
  35. 35.77 + ? = 100
  36. 36.56 + ? = 100
  37. 37.71 + ? = 100
  38. 38.53 + ? = 100
  39. 39.51 + ? = 100
  40. 40.38 + ? = 100

Answer key

  1. 3
  2. 5
  3. 26
  4. 38
  5. 8
  6. 2
  7. 64
  8. 80
  9. 53
  10. 7
  11. 4
  12. 68
  13. 20
  14. 58
  15. 61
  16. 6
  17. 27
  18. 59
  19. 83
  20. 9
  21. 52
  22. 30
  23. 11
  24. 1
  25. 70
  26. 73
  27. 16
  28. 21
  29. 75
  30. 63
  31. 76
  32. 45
  33. 43
  34. 25
  35. 23
  36. 44
  37. 29
  38. 47
  39. 49
  40. 62

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