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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 117 · 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. 2.7 + ? = 10
  3. 3.71 + ? = 100
  4. 4.4 + ? = 10
  5. 5.18 + ? = 100
  6. 6.2 + ? = 10
  7. 7.3 + ? = 10
  8. 8.8 + ? = 10
  9. 9.39 + ? = 100
  10. 10.15 + ? = 100
  11. 11.84 + ? = 100
  12. 12.5 + ? = 10
  13. 13.59 + ? = 100
  14. 14.67 + ? = 100
  15. 15.1 + ? = 10
  16. 16.40 + ? = 100
  17. 17.42 + ? = 100
  18. 18.6 + ? = 10
  19. 19.77 + ? = 100
  20. 20.33 + ? = 100
  21. 21.30 + ? = 100
  22. 22.68 + ? = 100
  23. 23.47 + ? = 100
  24. 24.21 + ? = 100
  25. 25.73 + ? = 100
  26. 26.51 + ? = 100
  27. 27.13 + ? = 100
  28. 28.81 + ? = 100
  29. 29.12 + ? = 100
  30. 30.45 + ? = 100
  31. 31.9 + ? = 10
  32. 32.55 + ? = 100
  33. 33.69 + ? = 100
  34. 34.41 + ? = 100
  35. 35.49 + ? = 100
  36. 36.85 + ? = 100
  37. 37.72 + ? = 100
  38. 38.24 + ? = 100
  39. 39.57 + ? = 100
  40. 40.80 + ? = 100

Answer key

  1. 66
  2. 3
  3. 29
  4. 6
  5. 82
  6. 8
  7. 7
  8. 2
  9. 61
  10. 85
  11. 16
  12. 5
  13. 41
  14. 33
  15. 9
  16. 60
  17. 58
  18. 4
  19. 23
  20. 67
  21. 70
  22. 32
  23. 53
  24. 79
  25. 27
  26. 49
  27. 87
  28. 19
  29. 88
  30. 55
  31. 1
  32. 45
  33. 31
  34. 59
  35. 51
  36. 15
  37. 28
  38. 76
  39. 43
  40. 20

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