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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 242 · 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. 1.8 + ? = 10
  2. 2.29 + ? = 100
  3. 3.18 + ? = 100
  4. 4.63 + ? = 100
  5. 5.11 + ? = 100
  6. 6.1 + ? = 10
  7. 7.59 + ? = 100
  8. 8.4 + ? = 10
  9. 9.7 + ? = 10
  10. 10.9 + ? = 10
  11. 11.30 + ? = 100
  12. 12.42 + ? = 100
  13. 13.6 + ? = 10
  14. 14.55 + ? = 100
  15. 15.44 + ? = 100
  16. 16.47 + ? = 100
  17. 17.24 + ? = 100
  18. 18.83 + ? = 100
  19. 19.23 + ? = 100
  20. 20.33 + ? = 100
  21. 21.28 + ? = 100
  22. 22.5 + ? = 10
  23. 23.34 + ? = 100
  24. 24.19 + ? = 100
  25. 25.3 + ? = 10
  26. 26.79 + ? = 100
  27. 27.31 + ? = 100
  28. 28.66 + ? = 100
  29. 29.69 + ? = 100
  30. 30.2 + ? = 10
  31. 31.77 + ? = 100
  32. 32.22 + ? = 100
  33. 33.36 + ? = 100
  34. 34.46 + ? = 100
  35. 35.21 + ? = 100
  36. 36.35 + ? = 100
  37. 37.53 + ? = 100
  38. 38.70 + ? = 100
  39. 39.57 + ? = 100
  40. 40.60 + ? = 100

Answer key

  1. 2
  2. 71
  3. 82
  4. 37
  5. 89
  6. 9
  7. 41
  8. 6
  9. 3
  10. 1
  11. 70
  12. 58
  13. 4
  14. 45
  15. 56
  16. 53
  17. 76
  18. 17
  19. 77
  20. 67
  21. 72
  22. 5
  23. 66
  24. 81
  25. 7
  26. 21
  27. 69
  28. 34
  29. 31
  30. 8
  31. 23
  32. 78
  33. 64
  34. 54
  35. 79
  36. 65
  37. 47
  38. 30
  39. 43
  40. 40

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