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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 567 · 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. 1.11 + ? = 100
  2. 2.52 + ? = 100
  3. 3.3 + ? = 10
  4. 4.49 + ? = 100
  5. 5.55 + ? = 100
  6. 6.60 + ? = 100
  7. 7.21 + ? = 100
  8. 8.75 + ? = 100
  9. 9.44 + ? = 100
  10. 10.6 + ? = 10
  11. 11.2 + ? = 10
  12. 12.14 + ? = 100
  13. 13.61 + ? = 100
  14. 14.15 + ? = 100
  15. 15.4 + ? = 10
  16. 16.1 + ? = 10
  17. 17.9 + ? = 10
  18. 18.82 + ? = 100
  19. 19.54 + ? = 100
  20. 20.17 + ? = 100
  21. 21.46 + ? = 100
  22. 22.84 + ? = 100
  23. 23.7 + ? = 10
  24. 24.47 + ? = 100
  25. 25.57 + ? = 100
  26. 26.28 + ? = 100
  27. 27.5 + ? = 10
  28. 28.22 + ? = 100
  29. 29.86 + ? = 100
  30. 30.8 + ? = 10
  31. 31.13 + ? = 100
  32. 32.56 + ? = 100
  33. 33.23 + ? = 100
  34. 34.24 + ? = 100
  35. 35.64 + ? = 100
  36. 36.62 + ? = 100
  37. 37.78 + ? = 100
  38. 38.38 + ? = 100
  39. 39.70 + ? = 100
  40. 40.26 + ? = 100

Answer key

  1. 89
  2. 48
  3. 7
  4. 51
  5. 45
  6. 40
  7. 79
  8. 25
  9. 56
  10. 4
  11. 8
  12. 86
  13. 39
  14. 85
  15. 6
  16. 9
  17. 1
  18. 18
  19. 46
  20. 83
  21. 54
  22. 16
  23. 3
  24. 53
  25. 43
  26. 72
  27. 5
  28. 78
  29. 14
  30. 2
  31. 87
  32. 44
  33. 77
  34. 76
  35. 36
  36. 38
  37. 22
  38. 62
  39. 30
  40. 74

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