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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 315 · 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. 1.34 + ? = 100
  2. 2.2 + ? = 10
  3. 3.5 + ? = 10
  4. 4.86 + ? = 100
  5. 5.28 + ? = 100
  6. 6.3 + ? = 10
  7. 7.6 + ? = 10
  8. 8.69 + ? = 100
  9. 9.35 + ? = 100
  10. 10.30 + ? = 100
  11. 11.1 + ? = 10
  12. 12.66 + ? = 100
  13. 13.79 + ? = 100
  14. 14.54 + ? = 100
  15. 15.58 + ? = 100
  16. 16.22 + ? = 100
  17. 17.23 + ? = 100
  18. 18.8 + ? = 10
  19. 19.4 + ? = 10
  20. 20.19 + ? = 100
  21. 21.7 + ? = 10
  22. 22.9 + ? = 10
  23. 23.57 + ? = 100
  24. 24.67 + ? = 100
  25. 25.83 + ? = 100
  26. 26.16 + ? = 100
  27. 27.49 + ? = 100
  28. 28.70 + ? = 100
  29. 29.73 + ? = 100
  30. 30.88 + ? = 100
  31. 31.21 + ? = 100
  32. 32.42 + ? = 100
  33. 33.17 + ? = 100
  34. 34.56 + ? = 100
  35. 35.39 + ? = 100
  36. 36.44 + ? = 100
  37. 37.18 + ? = 100
  38. 38.74 + ? = 100
  39. 39.55 + ? = 100
  40. 40.81 + ? = 100

Answer key

  1. 66
  2. 8
  3. 5
  4. 14
  5. 72
  6. 7
  7. 4
  8. 31
  9. 65
  10. 70
  11. 9
  12. 34
  13. 21
  14. 46
  15. 42
  16. 78
  17. 77
  18. 2
  19. 6
  20. 81
  21. 3
  22. 1
  23. 43
  24. 33
  25. 17
  26. 84
  27. 51
  28. 30
  29. 27
  30. 12
  31. 79
  32. 58
  33. 83
  34. 44
  35. 61
  36. 56
  37. 82
  38. 26
  39. 45
  40. 19

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