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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 477 · 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. 1.9 + ? = 10
  2. 2.7 + ? = 10
  3. 3.5 + ? = 10
  4. 4.1 + ? = 10
  5. 5.29 + ? = 100
  6. 6.2 + ? = 10
  7. 7.36 + ? = 100
  8. 8.25 + ? = 100
  9. 9.6 + ? = 10
  10. 10.64 + ? = 100
  11. 11.61 + ? = 100
  12. 12.8 + ? = 10
  13. 13.41 + ? = 100
  14. 14.52 + ? = 100
  15. 15.27 + ? = 100
  16. 16.74 + ? = 100
  17. 17.3 + ? = 10
  18. 18.20 + ? = 100
  19. 19.15 + ? = 100
  20. 20.70 + ? = 100
  21. 21.21 + ? = 100
  22. 22.38 + ? = 100
  23. 23.72 + ? = 100
  24. 24.88 + ? = 100
  25. 25.43 + ? = 100
  26. 26.14 + ? = 100
  27. 27.13 + ? = 100
  28. 28.67 + ? = 100
  29. 29.4 + ? = 10
  30. 30.31 + ? = 100
  31. 31.35 + ? = 100
  32. 32.89 + ? = 100
  33. 33.18 + ? = 100
  34. 34.34 + ? = 100
  35. 35.75 + ? = 100
  36. 36.79 + ? = 100
  37. 37.22 + ? = 100
  38. 38.77 + ? = 100
  39. 39.24 + ? = 100
  40. 40.66 + ? = 100

Answer key

  1. 1
  2. 3
  3. 5
  4. 9
  5. 71
  6. 8
  7. 64
  8. 75
  9. 4
  10. 36
  11. 39
  12. 2
  13. 59
  14. 48
  15. 73
  16. 26
  17. 7
  18. 80
  19. 85
  20. 30
  21. 79
  22. 62
  23. 28
  24. 12
  25. 57
  26. 86
  27. 87
  28. 33
  29. 6
  30. 69
  31. 65
  32. 11
  33. 82
  34. 66
  35. 25
  36. 21
  37. 78
  38. 23
  39. 76
  40. 34

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