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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 642 · 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. 2.89 + ? = 100
  3. 3.83 + ? = 100
  4. 4.4 + ? = 10
  5. 5.1 + ? = 10
  6. 6.45 + ? = 100
  7. 7.3 + ? = 10
  8. 8.5 + ? = 10
  9. 9.26 + ? = 100
  10. 10.59 + ? = 100
  11. 11.25 + ? = 100
  12. 12.23 + ? = 100
  13. 13.17 + ? = 100
  14. 14.75 + ? = 100
  15. 15.2 + ? = 10
  16. 16.35 + ? = 100
  17. 17.52 + ? = 100
  18. 18.57 + ? = 100
  19. 19.7 + ? = 10
  20. 20.80 + ? = 100
  21. 21.8 + ? = 10
  22. 22.41 + ? = 100
  23. 23.31 + ? = 100
  24. 24.56 + ? = 100
  25. 25.16 + ? = 100
  26. 26.61 + ? = 100
  27. 27.46 + ? = 100
  28. 28.30 + ? = 100
  29. 29.60 + ? = 100
  30. 30.37 + ? = 100
  31. 31.6 + ? = 10
  32. 32.47 + ? = 100
  33. 33.53 + ? = 100
  34. 34.29 + ? = 100
  35. 35.28 + ? = 100
  36. 36.38 + ? = 100
  37. 37.32 + ? = 100
  38. 38.82 + ? = 100
  39. 39.22 + ? = 100
  40. 40.44 + ? = 100

Answer key

  1. 1
  2. 11
  3. 17
  4. 6
  5. 9
  6. 55
  7. 7
  8. 5
  9. 74
  10. 41
  11. 75
  12. 77
  13. 83
  14. 25
  15. 8
  16. 65
  17. 48
  18. 43
  19. 3
  20. 20
  21. 2
  22. 59
  23. 69
  24. 44
  25. 84
  26. 39
  27. 54
  28. 70
  29. 40
  30. 63
  31. 4
  32. 53
  33. 47
  34. 71
  35. 72
  36. 62
  37. 68
  38. 18
  39. 78
  40. 56

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