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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 221 · 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. 1.14 + ? = 100
  2. 2.24 + ? = 100
  3. 3.7 + ? = 10
  4. 4.4 + ? = 10
  5. 5.17 + ? = 100
  6. 6.1 + ? = 10
  7. 7.2 + ? = 10
  8. 8.9 + ? = 10
  9. 9.45 + ? = 100
  10. 10.88 + ? = 100
  11. 11.18 + ? = 100
  12. 12.8 + ? = 10
  13. 13.26 + ? = 100
  14. 14.80 + ? = 100
  15. 15.11 + ? = 100
  16. 16.6 + ? = 10
  17. 17.42 + ? = 100
  18. 18.63 + ? = 100
  19. 19.3 + ? = 10
  20. 20.77 + ? = 100
  21. 21.36 + ? = 100
  22. 22.65 + ? = 100
  23. 23.61 + ? = 100
  24. 24.30 + ? = 100
  25. 25.75 + ? = 100
  26. 26.5 + ? = 10
  27. 27.59 + ? = 100
  28. 28.54 + ? = 100
  29. 29.25 + ? = 100
  30. 30.21 + ? = 100
  31. 31.33 + ? = 100
  32. 32.55 + ? = 100
  33. 33.84 + ? = 100
  34. 34.72 + ? = 100
  35. 35.89 + ? = 100
  36. 36.79 + ? = 100
  37. 37.81 + ? = 100
  38. 38.60 + ? = 100
  39. 39.47 + ? = 100
  40. 40.67 + ? = 100

Answer key

  1. 86
  2. 76
  3. 3
  4. 6
  5. 83
  6. 9
  7. 8
  8. 1
  9. 55
  10. 12
  11. 82
  12. 2
  13. 74
  14. 20
  15. 89
  16. 4
  17. 58
  18. 37
  19. 7
  20. 23
  21. 64
  22. 35
  23. 39
  24. 70
  25. 25
  26. 5
  27. 41
  28. 46
  29. 75
  30. 79
  31. 67
  32. 45
  33. 16
  34. 28
  35. 11
  36. 21
  37. 19
  38. 40
  39. 53
  40. 33

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