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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 652 · 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. 1.23 + ? = 100
  2. 2.7 + ? = 10
  3. 3.75 + ? = 100
  4. 4.3 + ? = 10
  5. 5.31 + ? = 100
  6. 6.6 + ? = 10
  7. 7.51 + ? = 100
  8. 8.81 + ? = 100
  9. 9.9 + ? = 10
  10. 10.5 + ? = 10
  11. 11.8 + ? = 10
  12. 12.35 + ? = 100
  13. 13.77 + ? = 100
  14. 14.57 + ? = 100
  15. 15.59 + ? = 100
  16. 16.29 + ? = 100
  17. 17.2 + ? = 10
  18. 18.4 + ? = 10
  19. 19.1 + ? = 10
  20. 20.55 + ? = 100
  21. 21.15 + ? = 100
  22. 22.16 + ? = 100
  23. 23.62 + ? = 100
  24. 24.65 + ? = 100
  25. 25.22 + ? = 100
  26. 26.70 + ? = 100
  27. 27.25 + ? = 100
  28. 28.41 + ? = 100
  29. 29.37 + ? = 100
  30. 30.53 + ? = 100
  31. 31.13 + ? = 100
  32. 32.89 + ? = 100
  33. 33.68 + ? = 100
  34. 34.83 + ? = 100
  35. 35.20 + ? = 100
  36. 36.52 + ? = 100
  37. 37.56 + ? = 100
  38. 38.46 + ? = 100
  39. 39.48 + ? = 100
  40. 40.33 + ? = 100

Answer key

  1. 77
  2. 3
  3. 25
  4. 7
  5. 69
  6. 4
  7. 49
  8. 19
  9. 1
  10. 5
  11. 2
  12. 65
  13. 23
  14. 43
  15. 41
  16. 71
  17. 8
  18. 6
  19. 9
  20. 45
  21. 85
  22. 84
  23. 38
  24. 35
  25. 78
  26. 30
  27. 75
  28. 59
  29. 63
  30. 47
  31. 87
  32. 11
  33. 32
  34. 17
  35. 80
  36. 48
  37. 44
  38. 54
  39. 52
  40. 67

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