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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 330 · 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. 1.45 + ? = 100
  2. 2.88 + ? = 100
  3. 3.65 + ? = 100
  4. 4.23 + ? = 100
  5. 5.5 + ? = 10
  6. 6.1 + ? = 10
  7. 7.79 + ? = 100
  8. 8.18 + ? = 100
  9. 9.38 + ? = 100
  10. 10.7 + ? = 10
  11. 11.35 + ? = 100
  12. 12.4 + ? = 10
  13. 13.83 + ? = 100
  14. 14.19 + ? = 100
  15. 15.26 + ? = 100
  16. 16.30 + ? = 100
  17. 17.67 + ? = 100
  18. 18.48 + ? = 100
  19. 19.15 + ? = 100
  20. 20.9 + ? = 10
  21. 21.6 + ? = 10
  22. 22.74 + ? = 100
  23. 23.66 + ? = 100
  24. 24.82 + ? = 100
  25. 25.87 + ? = 100
  26. 26.44 + ? = 100
  27. 27.51 + ? = 100
  28. 28.69 + ? = 100
  29. 29.8 + ? = 10
  30. 30.46 + ? = 100
  31. 31.89 + ? = 100
  32. 32.71 + ? = 100
  33. 33.13 + ? = 100
  34. 34.3 + ? = 10
  35. 35.2 + ? = 10
  36. 36.73 + ? = 100
  37. 37.17 + ? = 100
  38. 38.16 + ? = 100
  39. 39.11 + ? = 100
  40. 40.61 + ? = 100

Answer key

  1. 55
  2. 12
  3. 35
  4. 77
  5. 5
  6. 9
  7. 21
  8. 82
  9. 62
  10. 3
  11. 65
  12. 6
  13. 17
  14. 81
  15. 74
  16. 70
  17. 33
  18. 52
  19. 85
  20. 1
  21. 4
  22. 26
  23. 34
  24. 18
  25. 13
  26. 56
  27. 49
  28. 31
  29. 2
  30. 54
  31. 11
  32. 29
  33. 87
  34. 7
  35. 8
  36. 27
  37. 83
  38. 84
  39. 89
  40. 39

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