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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 287 · 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. 1.4 + ? = 10
  2. 2.9 + ? = 10
  3. 3.70 + ? = 100
  4. 4.3 + ? = 10
  5. 5.74 + ? = 100
  6. 6.8 + ? = 10
  7. 7.25 + ? = 100
  8. 8.2 + ? = 10
  9. 9.5 + ? = 10
  10. 10.44 + ? = 100
  11. 11.69 + ? = 100
  12. 12.27 + ? = 100
  13. 13.36 + ? = 100
  14. 14.17 + ? = 100
  15. 15.19 + ? = 100
  16. 16.66 + ? = 100
  17. 17.68 + ? = 100
  18. 18.60 + ? = 100
  19. 19.48 + ? = 100
  20. 20.7 + ? = 10
  21. 21.49 + ? = 100
  22. 22.89 + ? = 100
  23. 23.1 + ? = 10
  24. 24.6 + ? = 10
  25. 25.57 + ? = 100
  26. 26.87 + ? = 100
  27. 27.11 + ? = 100
  28. 28.31 + ? = 100
  29. 29.51 + ? = 100
  30. 30.16 + ? = 100
  31. 31.39 + ? = 100
  32. 32.28 + ? = 100
  33. 33.42 + ? = 100
  34. 34.77 + ? = 100
  35. 35.26 + ? = 100
  36. 36.35 + ? = 100
  37. 37.76 + ? = 100
  38. 38.75 + ? = 100
  39. 39.83 + ? = 100
  40. 40.41 + ? = 100

Answer key

  1. 6
  2. 1
  3. 30
  4. 7
  5. 26
  6. 2
  7. 75
  8. 8
  9. 5
  10. 56
  11. 31
  12. 73
  13. 64
  14. 83
  15. 81
  16. 34
  17. 32
  18. 40
  19. 52
  20. 3
  21. 51
  22. 11
  23. 9
  24. 4
  25. 43
  26. 13
  27. 89
  28. 69
  29. 49
  30. 84
  31. 61
  32. 72
  33. 58
  34. 23
  35. 74
  36. 65
  37. 24
  38. 25
  39. 17
  40. 59

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