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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 134 · 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. 2.69 + ? = 100
  3. 3.7 + ? = 10
  4. 4.16 + ? = 100
  5. 5.51 + ? = 100
  6. 6.9 + ? = 10
  7. 7.29 + ? = 100
  8. 8.12 + ? = 100
  9. 9.81 + ? = 100
  10. 10.3 + ? = 10
  11. 11.28 + ? = 100
  12. 12.1 + ? = 10
  13. 13.8 + ? = 10
  14. 14.15 + ? = 100
  15. 15.4 + ? = 10
  16. 16.53 + ? = 100
  17. 17.6 + ? = 10
  18. 18.33 + ? = 100
  19. 19.78 + ? = 100
  20. 20.85 + ? = 100
  21. 21.5 + ? = 10
  22. 22.2 + ? = 10
  23. 23.22 + ? = 100
  24. 24.59 + ? = 100
  25. 25.47 + ? = 100
  26. 26.24 + ? = 100
  27. 27.64 + ? = 100
  28. 28.46 + ? = 100
  29. 29.14 + ? = 100
  30. 30.67 + ? = 100
  31. 31.42 + ? = 100
  32. 32.62 + ? = 100
  33. 33.83 + ? = 100
  34. 34.23 + ? = 100
  35. 35.65 + ? = 100
  36. 36.84 + ? = 100
  37. 37.72 + ? = 100
  38. 38.43 + ? = 100
  39. 39.70 + ? = 100
  40. 40.18 + ? = 100

Answer key

  1. 66
  2. 31
  3. 3
  4. 84
  5. 49
  6. 1
  7. 71
  8. 88
  9. 19
  10. 7
  11. 72
  12. 9
  13. 2
  14. 85
  15. 6
  16. 47
  17. 4
  18. 67
  19. 22
  20. 15
  21. 5
  22. 8
  23. 78
  24. 41
  25. 53
  26. 76
  27. 36
  28. 54
  29. 86
  30. 33
  31. 58
  32. 38
  33. 17
  34. 77
  35. 35
  36. 16
  37. 28
  38. 57
  39. 30
  40. 82

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