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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 99 · 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. 1.8 + ? = 10
  2. 2.4 + ? = 10
  3. 3.6 + ? = 10
  4. 4.42 + ? = 100
  5. 5.2 + ? = 10
  6. 6.16 + ? = 100
  7. 7.3 + ? = 10
  8. 8.38 + ? = 100
  9. 9.39 + ? = 100
  10. 10.7 + ? = 10
  11. 11.41 + ? = 100
  12. 12.89 + ? = 100
  13. 13.85 + ? = 100
  14. 14.1 + ? = 10
  15. 15.26 + ? = 100
  16. 16.48 + ? = 100
  17. 17.37 + ? = 100
  18. 18.51 + ? = 100
  19. 19.14 + ? = 100
  20. 20.9 + ? = 10
  21. 21.55 + ? = 100
  22. 22.30 + ? = 100
  23. 23.88 + ? = 100
  24. 24.15 + ? = 100
  25. 25.40 + ? = 100
  26. 26.57 + ? = 100
  27. 27.50 + ? = 100
  28. 28.33 + ? = 100
  29. 29.23 + ? = 100
  30. 30.25 + ? = 100
  31. 31.24 + ? = 100
  32. 32.19 + ? = 100
  33. 33.11 + ? = 100
  34. 34.43 + ? = 100
  35. 35.66 + ? = 100
  36. 36.77 + ? = 100
  37. 37.18 + ? = 100
  38. 38.54 + ? = 100
  39. 39.5 + ? = 10
  40. 40.60 + ? = 100

Answer key

  1. 2
  2. 6
  3. 4
  4. 58
  5. 8
  6. 84
  7. 7
  8. 62
  9. 61
  10. 3
  11. 59
  12. 11
  13. 15
  14. 9
  15. 74
  16. 52
  17. 63
  18. 49
  19. 86
  20. 1
  21. 45
  22. 70
  23. 12
  24. 85
  25. 60
  26. 43
  27. 50
  28. 67
  29. 77
  30. 75
  31. 76
  32. 81
  33. 89
  34. 57
  35. 34
  36. 23
  37. 82
  38. 46
  39. 5
  40. 40

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