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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 646 · 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. 1.17 + ? = 100
  2. 2.2 + ? = 10
  3. 3.4 + ? = 10
  4. 4.1 + ? = 10
  5. 5.65 + ? = 100
  6. 6.81 + ? = 100
  7. 7.29 + ? = 100
  8. 8.63 + ? = 100
  9. 9.14 + ? = 100
  10. 10.51 + ? = 100
  11. 11.89 + ? = 100
  12. 12.66 + ? = 100
  13. 13.35 + ? = 100
  14. 14.9 + ? = 10
  15. 15.7 + ? = 10
  16. 16.8 + ? = 10
  17. 17.82 + ? = 100
  18. 18.34 + ? = 100
  19. 19.23 + ? = 100
  20. 20.47 + ? = 100
  21. 21.5 + ? = 10
  22. 22.59 + ? = 100
  23. 23.6 + ? = 10
  24. 24.3 + ? = 10
  25. 25.76 + ? = 100
  26. 26.25 + ? = 100
  27. 27.33 + ? = 100
  28. 28.50 + ? = 100
  29. 29.39 + ? = 100
  30. 30.12 + ? = 100
  31. 31.85 + ? = 100
  32. 32.70 + ? = 100
  33. 33.36 + ? = 100
  34. 34.32 + ? = 100
  35. 35.48 + ? = 100
  36. 36.30 + ? = 100
  37. 37.77 + ? = 100
  38. 38.67 + ? = 100
  39. 39.20 + ? = 100
  40. 40.22 + ? = 100

Answer key

  1. 83
  2. 8
  3. 6
  4. 9
  5. 35
  6. 19
  7. 71
  8. 37
  9. 86
  10. 49
  11. 11
  12. 34
  13. 65
  14. 1
  15. 3
  16. 2
  17. 18
  18. 66
  19. 77
  20. 53
  21. 5
  22. 41
  23. 4
  24. 7
  25. 24
  26. 75
  27. 67
  28. 50
  29. 61
  30. 88
  31. 15
  32. 30
  33. 64
  34. 68
  35. 52
  36. 70
  37. 23
  38. 33
  39. 80
  40. 78

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