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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 167 · 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. 1.89 + ? = 100
  2. 2.16 + ? = 100
  3. 3.4 + ? = 10
  4. 4.8 + ? = 10
  5. 5.71 + ? = 100
  6. 6.80 + ? = 100
  7. 7.45 + ? = 100
  8. 8.84 + ? = 100
  9. 9.17 + ? = 100
  10. 10.68 + ? = 100
  11. 11.58 + ? = 100
  12. 12.37 + ? = 100
  13. 13.28 + ? = 100
  14. 14.63 + ? = 100
  15. 15.3 + ? = 10
  16. 16.18 + ? = 100
  17. 17.7 + ? = 10
  18. 18.12 + ? = 100
  19. 19.69 + ? = 100
  20. 20.85 + ? = 100
  21. 21.6 + ? = 10
  22. 22.60 + ? = 100
  23. 23.33 + ? = 100
  24. 24.1 + ? = 10
  25. 25.81 + ? = 100
  26. 26.2 + ? = 10
  27. 27.9 + ? = 10
  28. 28.77 + ? = 100
  29. 29.56 + ? = 100
  30. 30.15 + ? = 100
  31. 31.5 + ? = 10
  32. 32.86 + ? = 100
  33. 33.64 + ? = 100
  34. 34.20 + ? = 100
  35. 35.36 + ? = 100
  36. 36.62 + ? = 100
  37. 37.70 + ? = 100
  38. 38.19 + ? = 100
  39. 39.54 + ? = 100
  40. 40.31 + ? = 100

Answer key

  1. 11
  2. 84
  3. 6
  4. 2
  5. 29
  6. 20
  7. 55
  8. 16
  9. 83
  10. 32
  11. 42
  12. 63
  13. 72
  14. 37
  15. 7
  16. 82
  17. 3
  18. 88
  19. 31
  20. 15
  21. 4
  22. 40
  23. 67
  24. 9
  25. 19
  26. 8
  27. 1
  28. 23
  29. 44
  30. 85
  31. 5
  32. 14
  33. 36
  34. 80
  35. 64
  36. 38
  37. 30
  38. 81
  39. 46
  40. 69

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