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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 161 · 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. 2.72 + ? = 100
  3. 3.89 + ? = 100
  4. 4.3 + ? = 10
  5. 5.73 + ? = 100
  6. 6.29 + ? = 100
  7. 7.20 + ? = 100
  8. 8.70 + ? = 100
  9. 9.65 + ? = 100
  10. 10.86 + ? = 100
  11. 11.85 + ? = 100
  12. 12.56 + ? = 100
  13. 13.33 + ? = 100
  14. 14.71 + ? = 100
  15. 15.36 + ? = 100
  16. 16.30 + ? = 100
  17. 17.41 + ? = 100
  18. 18.64 + ? = 100
  19. 19.68 + ? = 100
  20. 20.7 + ? = 10
  21. 21.8 + ? = 10
  22. 22.1 + ? = 10
  23. 23.6 + ? = 10
  24. 24.4 + ? = 10
  25. 25.9 + ? = 10
  26. 26.34 + ? = 100
  27. 27.62 + ? = 100
  28. 28.47 + ? = 100
  29. 29.67 + ? = 100
  30. 30.57 + ? = 100
  31. 31.5 + ? = 10
  32. 32.43 + ? = 100
  33. 33.59 + ? = 100
  34. 34.16 + ? = 100
  35. 35.39 + ? = 100
  36. 36.35 + ? = 100
  37. 37.50 + ? = 100
  38. 38.66 + ? = 100
  39. 39.14 + ? = 100
  40. 40.32 + ? = 100

Answer key

  1. 8
  2. 28
  3. 11
  4. 7
  5. 27
  6. 71
  7. 80
  8. 30
  9. 35
  10. 14
  11. 15
  12. 44
  13. 67
  14. 29
  15. 64
  16. 70
  17. 59
  18. 36
  19. 32
  20. 3
  21. 2
  22. 9
  23. 4
  24. 6
  25. 1
  26. 66
  27. 38
  28. 53
  29. 33
  30. 43
  31. 5
  32. 57
  33. 41
  34. 84
  35. 61
  36. 65
  37. 50
  38. 34
  39. 86
  40. 68

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