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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 77 · 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. 1.67 + ? = 100
  2. 2.6 + ? = 10
  3. 3.11 + ? = 100
  4. 4.2 + ? = 10
  5. 5.7 + ? = 10
  6. 6.8 + ? = 10
  7. 7.4 + ? = 10
  8. 8.55 + ? = 100
  9. 9.50 + ? = 100
  10. 10.29 + ? = 100
  11. 11.75 + ? = 100
  12. 12.1 + ? = 10
  13. 13.69 + ? = 100
  14. 14.72 + ? = 100
  15. 15.51 + ? = 100
  16. 16.15 + ? = 100
  17. 17.70 + ? = 100
  18. 18.35 + ? = 100
  19. 19.3 + ? = 10
  20. 20.89 + ? = 100
  21. 21.9 + ? = 10
  22. 22.13 + ? = 100
  23. 23.52 + ? = 100
  24. 24.36 + ? = 100
  25. 25.26 + ? = 100
  26. 26.85 + ? = 100
  27. 27.58 + ? = 100
  28. 28.5 + ? = 10
  29. 29.73 + ? = 100
  30. 30.74 + ? = 100
  31. 31.27 + ? = 100
  32. 32.61 + ? = 100
  33. 33.48 + ? = 100
  34. 34.12 + ? = 100
  35. 35.83 + ? = 100
  36. 36.14 + ? = 100
  37. 37.20 + ? = 100
  38. 38.31 + ? = 100
  39. 39.16 + ? = 100
  40. 40.17 + ? = 100

Answer key

  1. 33
  2. 4
  3. 89
  4. 8
  5. 3
  6. 2
  7. 6
  8. 45
  9. 50
  10. 71
  11. 25
  12. 9
  13. 31
  14. 28
  15. 49
  16. 85
  17. 30
  18. 65
  19. 7
  20. 11
  21. 1
  22. 87
  23. 48
  24. 64
  25. 74
  26. 15
  27. 42
  28. 5
  29. 27
  30. 26
  31. 73
  32. 39
  33. 52
  34. 88
  35. 17
  36. 86
  37. 80
  38. 69
  39. 84
  40. 83

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