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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 717 · 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. 1.54 + ? = 100
  2. 2.6 + ? = 10
  3. 3.14 + ? = 100
  4. 4.26 + ? = 100
  5. 5.7 + ? = 10
  6. 6.3 + ? = 10
  7. 7.9 + ? = 10
  8. 8.5 + ? = 10
  9. 9.16 + ? = 100
  10. 10.64 + ? = 100
  11. 11.15 + ? = 100
  12. 12.8 + ? = 10
  13. 13.4 + ? = 10
  14. 14.40 + ? = 100
  15. 15.78 + ? = 100
  16. 16.76 + ? = 100
  17. 17.59 + ? = 100
  18. 18.74 + ? = 100
  19. 19.50 + ? = 100
  20. 20.21 + ? = 100
  21. 21.86 + ? = 100
  22. 22.47 + ? = 100
  23. 23.23 + ? = 100
  24. 24.85 + ? = 100
  25. 25.17 + ? = 100
  26. 26.24 + ? = 100
  27. 27.66 + ? = 100
  28. 28.2 + ? = 10
  29. 29.68 + ? = 100
  30. 30.83 + ? = 100
  31. 31.57 + ? = 100
  32. 32.48 + ? = 100
  33. 33.62 + ? = 100
  34. 34.53 + ? = 100
  35. 35.28 + ? = 100
  36. 36.42 + ? = 100
  37. 37.65 + ? = 100
  38. 38.52 + ? = 100
  39. 39.1 + ? = 10
  40. 40.22 + ? = 100

Answer key

  1. 46
  2. 4
  3. 86
  4. 74
  5. 3
  6. 7
  7. 1
  8. 5
  9. 84
  10. 36
  11. 85
  12. 2
  13. 6
  14. 60
  15. 22
  16. 24
  17. 41
  18. 26
  19. 50
  20. 79
  21. 14
  22. 53
  23. 77
  24. 15
  25. 83
  26. 76
  27. 34
  28. 8
  29. 32
  30. 17
  31. 43
  32. 52
  33. 38
  34. 47
  35. 72
  36. 58
  37. 35
  38. 48
  39. 9
  40. 78

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