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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 675 · 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. 2.6 + ? = 10
  3. 3.39 + ? = 100
  4. 4.3 + ? = 10
  5. 5.11 + ? = 100
  6. 6.49 + ? = 100
  7. 7.66 + ? = 100
  8. 8.13 + ? = 100
  9. 9.22 + ? = 100
  10. 10.32 + ? = 100
  11. 11.81 + ? = 100
  12. 12.27 + ? = 100
  13. 13.9 + ? = 10
  14. 14.76 + ? = 100
  15. 15.1 + ? = 10
  16. 16.2 + ? = 10
  17. 17.45 + ? = 100
  18. 18.60 + ? = 100
  19. 19.8 + ? = 10
  20. 20.53 + ? = 100
  21. 21.83 + ? = 100
  22. 22.7 + ? = 10
  23. 23.5 + ? = 10
  24. 24.4 + ? = 10
  25. 25.48 + ? = 100
  26. 26.74 + ? = 100
  27. 27.25 + ? = 100
  28. 28.55 + ? = 100
  29. 29.56 + ? = 100
  30. 30.35 + ? = 100
  31. 31.20 + ? = 100
  32. 32.61 + ? = 100
  33. 33.31 + ? = 100
  34. 34.18 + ? = 100
  35. 35.12 + ? = 100
  36. 36.15 + ? = 100
  37. 37.87 + ? = 100
  38. 38.80 + ? = 100
  39. 39.54 + ? = 100
  40. 40.68 + ? = 100

Answer key

  1. 77
  2. 4
  3. 61
  4. 7
  5. 89
  6. 51
  7. 34
  8. 87
  9. 78
  10. 68
  11. 19
  12. 73
  13. 1
  14. 24
  15. 9
  16. 8
  17. 55
  18. 40
  19. 2
  20. 47
  21. 17
  22. 3
  23. 5
  24. 6
  25. 52
  26. 26
  27. 75
  28. 45
  29. 44
  30. 65
  31. 80
  32. 39
  33. 69
  34. 82
  35. 88
  36. 85
  37. 13
  38. 20
  39. 46
  40. 32

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