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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 452 · 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. 1.2 + ? = 10
  2. 2.62 + ? = 100
  3. 3.89 + ? = 100
  4. 4.11 + ? = 100
  5. 5.9 + ? = 10
  6. 6.18 + ? = 100
  7. 7.1 + ? = 10
  8. 8.13 + ? = 100
  9. 9.52 + ? = 100
  10. 10.58 + ? = 100
  11. 11.61 + ? = 100
  12. 12.7 + ? = 10
  13. 13.5 + ? = 10
  14. 14.6 + ? = 10
  15. 15.77 + ? = 100
  16. 16.17 + ? = 100
  17. 17.3 + ? = 10
  18. 18.12 + ? = 100
  19. 19.44 + ? = 100
  20. 20.8 + ? = 10
  21. 21.15 + ? = 100
  22. 22.36 + ? = 100
  23. 23.86 + ? = 100
  24. 24.88 + ? = 100
  25. 25.67 + ? = 100
  26. 26.27 + ? = 100
  27. 27.32 + ? = 100
  28. 28.75 + ? = 100
  29. 29.83 + ? = 100
  30. 30.59 + ? = 100
  31. 31.29 + ? = 100
  32. 32.4 + ? = 10
  33. 33.34 + ? = 100
  34. 34.25 + ? = 100
  35. 35.56 + ? = 100
  36. 36.54 + ? = 100
  37. 37.30 + ? = 100
  38. 38.47 + ? = 100
  39. 39.55 + ? = 100
  40. 40.76 + ? = 100

Answer key

  1. 8
  2. 38
  3. 11
  4. 89
  5. 1
  6. 82
  7. 9
  8. 87
  9. 48
  10. 42
  11. 39
  12. 3
  13. 5
  14. 4
  15. 23
  16. 83
  17. 7
  18. 88
  19. 56
  20. 2
  21. 85
  22. 64
  23. 14
  24. 12
  25. 33
  26. 73
  27. 68
  28. 25
  29. 17
  30. 41
  31. 71
  32. 6
  33. 66
  34. 75
  35. 44
  36. 46
  37. 70
  38. 53
  39. 45
  40. 24

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