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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 125 · 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. 1.77 + ? = 100
  2. 2.28 + ? = 100
  3. 3.23 + ? = 100
  4. 4.8 + ? = 10
  5. 5.89 + ? = 100
  6. 6.9 + ? = 10
  7. 7.33 + ? = 100
  8. 8.70 + ? = 100
  9. 9.66 + ? = 100
  10. 10.12 + ? = 100
  11. 11.2 + ? = 10
  12. 12.44 + ? = 100
  13. 13.7 + ? = 10
  14. 14.26 + ? = 100
  15. 15.49 + ? = 100
  16. 16.74 + ? = 100
  17. 17.5 + ? = 10
  18. 18.14 + ? = 100
  19. 19.71 + ? = 100
  20. 20.22 + ? = 100
  21. 21.82 + ? = 100
  22. 22.36 + ? = 100
  23. 23.37 + ? = 100
  24. 24.1 + ? = 10
  25. 25.29 + ? = 100
  26. 26.4 + ? = 10
  27. 27.46 + ? = 100
  28. 28.31 + ? = 100
  29. 29.11 + ? = 100
  30. 30.45 + ? = 100
  31. 31.27 + ? = 100
  32. 32.25 + ? = 100
  33. 33.18 + ? = 100
  34. 34.81 + ? = 100
  35. 35.3 + ? = 10
  36. 36.64 + ? = 100
  37. 37.63 + ? = 100
  38. 38.59 + ? = 100
  39. 39.6 + ? = 10
  40. 40.43 + ? = 100

Answer key

  1. 23
  2. 72
  3. 77
  4. 2
  5. 11
  6. 1
  7. 67
  8. 30
  9. 34
  10. 88
  11. 8
  12. 56
  13. 3
  14. 74
  15. 51
  16. 26
  17. 5
  18. 86
  19. 29
  20. 78
  21. 18
  22. 64
  23. 63
  24. 9
  25. 71
  26. 6
  27. 54
  28. 69
  29. 89
  30. 55
  31. 73
  32. 75
  33. 82
  34. 19
  35. 7
  36. 36
  37. 37
  38. 41
  39. 4
  40. 57

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