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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 597 · 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. 1.3 + ? = 10
  2. 2.77 + ? = 100
  3. 3.2 + ? = 10
  4. 4.1 + ? = 10
  5. 5.4 + ? = 10
  6. 6.20 + ? = 100
  7. 7.66 + ? = 100
  8. 8.5 + ? = 10
  9. 9.83 + ? = 100
  10. 10.7 + ? = 10
  11. 11.21 + ? = 100
  12. 12.6 + ? = 10
  13. 13.85 + ? = 100
  14. 14.42 + ? = 100
  15. 15.36 + ? = 100
  16. 16.18 + ? = 100
  17. 17.35 + ? = 100
  18. 18.9 + ? = 10
  19. 19.45 + ? = 100
  20. 20.27 + ? = 100
  21. 21.17 + ? = 100
  22. 22.84 + ? = 100
  23. 23.80 + ? = 100
  24. 24.69 + ? = 100
  25. 25.38 + ? = 100
  26. 26.79 + ? = 100
  27. 27.8 + ? = 10
  28. 28.23 + ? = 100
  29. 29.12 + ? = 100
  30. 30.60 + ? = 100
  31. 31.31 + ? = 100
  32. 32.74 + ? = 100
  33. 33.30 + ? = 100
  34. 34.62 + ? = 100
  35. 35.64 + ? = 100
  36. 36.65 + ? = 100
  37. 37.75 + ? = 100
  38. 38.49 + ? = 100
  39. 39.33 + ? = 100
  40. 40.11 + ? = 100

Answer key

  1. 7
  2. 23
  3. 8
  4. 9
  5. 6
  6. 80
  7. 34
  8. 5
  9. 17
  10. 3
  11. 79
  12. 4
  13. 15
  14. 58
  15. 64
  16. 82
  17. 65
  18. 1
  19. 55
  20. 73
  21. 83
  22. 16
  23. 20
  24. 31
  25. 62
  26. 21
  27. 2
  28. 77
  29. 88
  30. 40
  31. 69
  32. 26
  33. 70
  34. 38
  35. 36
  36. 35
  37. 25
  38. 51
  39. 67
  40. 89

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