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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 481 · 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. 1.29 + ? = 100
  2. 2.7 + ? = 10
  3. 3.17 + ? = 100
  4. 4.88 + ? = 100
  5. 5.9 + ? = 10
  6. 6.1 + ? = 10
  7. 7.4 + ? = 10
  8. 8.11 + ? = 100
  9. 9.25 + ? = 100
  10. 10.48 + ? = 100
  11. 11.15 + ? = 100
  12. 12.6 + ? = 10
  13. 13.23 + ? = 100
  14. 14.2 + ? = 10
  15. 15.42 + ? = 100
  16. 16.82 + ? = 100
  17. 17.72 + ? = 100
  18. 18.16 + ? = 100
  19. 19.33 + ? = 100
  20. 20.8 + ? = 10
  21. 21.83 + ? = 100
  22. 22.53 + ? = 100
  23. 23.18 + ? = 100
  24. 24.22 + ? = 100
  25. 25.5 + ? = 10
  26. 26.3 + ? = 10
  27. 27.64 + ? = 100
  28. 28.70 + ? = 100
  29. 29.45 + ? = 100
  30. 30.84 + ? = 100
  31. 31.65 + ? = 100
  32. 32.49 + ? = 100
  33. 33.32 + ? = 100
  34. 34.27 + ? = 100
  35. 35.69 + ? = 100
  36. 36.21 + ? = 100
  37. 37.43 + ? = 100
  38. 38.57 + ? = 100
  39. 39.50 + ? = 100
  40. 40.73 + ? = 100

Answer key

  1. 71
  2. 3
  3. 83
  4. 12
  5. 1
  6. 9
  7. 6
  8. 89
  9. 75
  10. 52
  11. 85
  12. 4
  13. 77
  14. 8
  15. 58
  16. 18
  17. 28
  18. 84
  19. 67
  20. 2
  21. 17
  22. 47
  23. 82
  24. 78
  25. 5
  26. 7
  27. 36
  28. 30
  29. 55
  30. 16
  31. 35
  32. 51
  33. 68
  34. 73
  35. 31
  36. 79
  37. 57
  38. 43
  39. 50
  40. 27

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