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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 499 · 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. 1.24 + ? = 100
  2. 2.37 + ? = 100
  3. 3.81 + ? = 100
  4. 4.50 + ? = 100
  5. 5.7 + ? = 10
  6. 6.4 + ? = 10
  7. 7.6 + ? = 10
  8. 8.5 + ? = 10
  9. 9.41 + ? = 100
  10. 10.1 + ? = 10
  11. 11.20 + ? = 100
  12. 12.34 + ? = 100
  13. 13.89 + ? = 100
  14. 14.9 + ? = 10
  15. 15.77 + ? = 100
  16. 16.30 + ? = 100
  17. 17.46 + ? = 100
  18. 18.86 + ? = 100
  19. 19.21 + ? = 100
  20. 20.3 + ? = 10
  21. 21.2 + ? = 10
  22. 22.35 + ? = 100
  23. 23.56 + ? = 100
  24. 24.63 + ? = 100
  25. 25.18 + ? = 100
  26. 26.11 + ? = 100
  27. 27.73 + ? = 100
  28. 28.55 + ? = 100
  29. 29.42 + ? = 100
  30. 30.65 + ? = 100
  31. 31.44 + ? = 100
  32. 32.58 + ? = 100
  33. 33.17 + ? = 100
  34. 34.54 + ? = 100
  35. 35.85 + ? = 100
  36. 36.71 + ? = 100
  37. 37.64 + ? = 100
  38. 38.59 + ? = 100
  39. 39.16 + ? = 100
  40. 40.31 + ? = 100

Answer key

  1. 76
  2. 63
  3. 19
  4. 50
  5. 3
  6. 6
  7. 4
  8. 5
  9. 59
  10. 9
  11. 80
  12. 66
  13. 11
  14. 1
  15. 23
  16. 70
  17. 54
  18. 14
  19. 79
  20. 7
  21. 8
  22. 65
  23. 44
  24. 37
  25. 82
  26. 89
  27. 27
  28. 45
  29. 58
  30. 35
  31. 56
  32. 42
  33. 83
  34. 46
  35. 15
  36. 29
  37. 36
  38. 41
  39. 84
  40. 69

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