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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 11 · 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. 1.71 + ? = 100
  2. 2.63 + ? = 100
  3. 3.5 + ? = 10
  4. 4.86 + ? = 100
  5. 5.11 + ? = 100
  6. 6.7 + ? = 10
  7. 7.2 + ? = 10
  8. 8.31 + ? = 100
  9. 9.53 + ? = 100
  10. 10.55 + ? = 100
  11. 11.8 + ? = 10
  12. 12.3 + ? = 10
  13. 13.48 + ? = 100
  14. 14.72 + ? = 100
  15. 15.15 + ? = 100
  16. 16.6 + ? = 10
  17. 17.1 + ? = 10
  18. 18.88 + ? = 100
  19. 19.78 + ? = 100
  20. 20.16 + ? = 100
  21. 21.40 + ? = 100
  22. 22.46 + ? = 100
  23. 23.33 + ? = 100
  24. 24.4 + ? = 10
  25. 25.75 + ? = 100
  26. 26.18 + ? = 100
  27. 27.13 + ? = 100
  28. 28.26 + ? = 100
  29. 29.23 + ? = 100
  30. 30.37 + ? = 100
  31. 31.41 + ? = 100
  32. 32.34 + ? = 100
  33. 33.66 + ? = 100
  34. 34.9 + ? = 10
  35. 35.51 + ? = 100
  36. 36.70 + ? = 100
  37. 37.85 + ? = 100
  38. 38.65 + ? = 100
  39. 39.12 + ? = 100
  40. 40.24 + ? = 100

Answer key

  1. 29
  2. 37
  3. 5
  4. 14
  5. 89
  6. 3
  7. 8
  8. 69
  9. 47
  10. 45
  11. 2
  12. 7
  13. 52
  14. 28
  15. 85
  16. 4
  17. 9
  18. 12
  19. 22
  20. 84
  21. 60
  22. 54
  23. 67
  24. 6
  25. 25
  26. 82
  27. 87
  28. 74
  29. 77
  30. 63
  31. 59
  32. 66
  33. 34
  34. 1
  35. 49
  36. 30
  37. 15
  38. 35
  39. 88
  40. 76

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