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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 710 · 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. 1.16 + ? = 100
  2. 2.1 + ? = 10
  3. 3.48 + ? = 100
  4. 4.5 + ? = 10
  5. 5.2 + ? = 10
  6. 6.55 + ? = 100
  7. 7.85 + ? = 100
  8. 8.3 + ? = 10
  9. 9.32 + ? = 100
  10. 10.68 + ? = 100
  11. 11.74 + ? = 100
  12. 12.56 + ? = 100
  13. 13.14 + ? = 100
  14. 14.6 + ? = 10
  15. 15.54 + ? = 100
  16. 16.39 + ? = 100
  17. 17.9 + ? = 10
  18. 18.33 + ? = 100
  19. 19.34 + ? = 100
  20. 20.7 + ? = 10
  21. 21.52 + ? = 100
  22. 22.8 + ? = 10
  23. 23.4 + ? = 10
  24. 24.18 + ? = 100
  25. 25.35 + ? = 100
  26. 26.17 + ? = 100
  27. 27.61 + ? = 100
  28. 28.20 + ? = 100
  29. 29.89 + ? = 100
  30. 30.13 + ? = 100
  31. 31.59 + ? = 100
  32. 32.38 + ? = 100
  33. 33.75 + ? = 100
  34. 34.22 + ? = 100
  35. 35.65 + ? = 100
  36. 36.41 + ? = 100
  37. 37.27 + ? = 100
  38. 38.50 + ? = 100
  39. 39.11 + ? = 100
  40. 40.49 + ? = 100

Answer key

  1. 84
  2. 9
  3. 52
  4. 5
  5. 8
  6. 45
  7. 15
  8. 7
  9. 68
  10. 32
  11. 26
  12. 44
  13. 86
  14. 4
  15. 46
  16. 61
  17. 1
  18. 67
  19. 66
  20. 3
  21. 48
  22. 2
  23. 6
  24. 82
  25. 65
  26. 83
  27. 39
  28. 80
  29. 11
  30. 87
  31. 41
  32. 62
  33. 25
  34. 78
  35. 35
  36. 59
  37. 73
  38. 50
  39. 89
  40. 51

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