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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 262 · 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. 1.78 + ? = 100
  2. 2.7 + ? = 10
  3. 3.8 + ? = 10
  4. 4.1 + ? = 10
  5. 5.59 + ? = 100
  6. 6.5 + ? = 10
  7. 7.40 + ? = 100
  8. 8.43 + ? = 100
  9. 9.46 + ? = 100
  10. 10.60 + ? = 100
  11. 11.76 + ? = 100
  12. 12.82 + ? = 100
  13. 13.2 + ? = 10
  14. 14.6 + ? = 10
  15. 15.57 + ? = 100
  16. 16.37 + ? = 100
  17. 17.23 + ? = 100
  18. 18.3 + ? = 10
  19. 19.41 + ? = 100
  20. 20.4 + ? = 10
  21. 21.17 + ? = 100
  22. 22.18 + ? = 100
  23. 23.45 + ? = 100
  24. 24.15 + ? = 100
  25. 25.48 + ? = 100
  26. 26.13 + ? = 100
  27. 27.9 + ? = 10
  28. 28.68 + ? = 100
  29. 29.33 + ? = 100
  30. 30.21 + ? = 100
  31. 31.35 + ? = 100
  32. 32.77 + ? = 100
  33. 33.31 + ? = 100
  34. 34.52 + ? = 100
  35. 35.83 + ? = 100
  36. 36.70 + ? = 100
  37. 37.51 + ? = 100
  38. 38.89 + ? = 100
  39. 39.49 + ? = 100
  40. 40.58 + ? = 100

Answer key

  1. 22
  2. 3
  3. 2
  4. 9
  5. 41
  6. 5
  7. 60
  8. 57
  9. 54
  10. 40
  11. 24
  12. 18
  13. 8
  14. 4
  15. 43
  16. 63
  17. 77
  18. 7
  19. 59
  20. 6
  21. 83
  22. 82
  23. 55
  24. 85
  25. 52
  26. 87
  27. 1
  28. 32
  29. 67
  30. 79
  31. 65
  32. 23
  33. 69
  34. 48
  35. 17
  36. 30
  37. 49
  38. 11
  39. 51
  40. 42

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