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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 212 · 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. 1.33 + ? = 100
  2. 2.9 + ? = 10
  3. 3.2 + ? = 10
  4. 4.44 + ? = 100
  5. 5.67 + ? = 100
  6. 6.89 + ? = 100
  7. 7.5 + ? = 10
  8. 8.83 + ? = 100
  9. 9.4 + ? = 10
  10. 10.74 + ? = 100
  11. 11.32 + ? = 100
  12. 12.66 + ? = 100
  13. 13.1 + ? = 10
  14. 14.30 + ? = 100
  15. 15.73 + ? = 100
  16. 16.17 + ? = 100
  17. 17.3 + ? = 10
  18. 18.20 + ? = 100
  19. 19.8 + ? = 10
  20. 20.75 + ? = 100
  21. 21.28 + ? = 100
  22. 22.25 + ? = 100
  23. 23.15 + ? = 100
  24. 24.24 + ? = 100
  25. 25.59 + ? = 100
  26. 26.16 + ? = 100
  27. 27.6 + ? = 10
  28. 28.26 + ? = 100
  29. 29.63 + ? = 100
  30. 30.36 + ? = 100
  31. 31.7 + ? = 10
  32. 32.12 + ? = 100
  33. 33.29 + ? = 100
  34. 34.68 + ? = 100
  35. 35.37 + ? = 100
  36. 36.47 + ? = 100
  37. 37.62 + ? = 100
  38. 38.45 + ? = 100
  39. 39.71 + ? = 100
  40. 40.31 + ? = 100

Answer key

  1. 67
  2. 1
  3. 8
  4. 56
  5. 33
  6. 11
  7. 5
  8. 17
  9. 6
  10. 26
  11. 68
  12. 34
  13. 9
  14. 70
  15. 27
  16. 83
  17. 7
  18. 80
  19. 2
  20. 25
  21. 72
  22. 75
  23. 85
  24. 76
  25. 41
  26. 84
  27. 4
  28. 74
  29. 37
  30. 64
  31. 3
  32. 88
  33. 71
  34. 32
  35. 63
  36. 53
  37. 38
  38. 55
  39. 29
  40. 69

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