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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 131 · 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. 1.1 + ? = 10
  2. 2.2 + ? = 10
  3. 3.3 + ? = 10
  4. 4.35 + ? = 100
  5. 5.4 + ? = 10
  6. 6.6 + ? = 10
  7. 7.43 + ? = 100
  8. 8.5 + ? = 10
  9. 9.9 + ? = 10
  10. 10.45 + ? = 100
  11. 11.83 + ? = 100
  12. 12.44 + ? = 100
  13. 13.61 + ? = 100
  14. 14.8 + ? = 10
  15. 15.42 + ? = 100
  16. 16.28 + ? = 100
  17. 17.36 + ? = 100
  18. 18.12 + ? = 100
  19. 19.58 + ? = 100
  20. 20.50 + ? = 100
  21. 21.66 + ? = 100
  22. 22.7 + ? = 10
  23. 23.78 + ? = 100
  24. 24.52 + ? = 100
  25. 25.70 + ? = 100
  26. 26.65 + ? = 100
  27. 27.85 + ? = 100
  28. 28.14 + ? = 100
  29. 29.64 + ? = 100
  30. 30.21 + ? = 100
  31. 31.71 + ? = 100
  32. 32.13 + ? = 100
  33. 33.40 + ? = 100
  34. 34.11 + ? = 100
  35. 35.37 + ? = 100
  36. 36.76 + ? = 100
  37. 37.82 + ? = 100
  38. 38.46 + ? = 100
  39. 39.89 + ? = 100
  40. 40.60 + ? = 100

Answer key

  1. 9
  2. 8
  3. 7
  4. 65
  5. 6
  6. 4
  7. 57
  8. 5
  9. 1
  10. 55
  11. 17
  12. 56
  13. 39
  14. 2
  15. 58
  16. 72
  17. 64
  18. 88
  19. 42
  20. 50
  21. 34
  22. 3
  23. 22
  24. 48
  25. 30
  26. 35
  27. 15
  28. 86
  29. 36
  30. 79
  31. 29
  32. 87
  33. 60
  34. 89
  35. 63
  36. 24
  37. 18
  38. 54
  39. 11
  40. 40

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