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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 325 · 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. 1.18 + ? = 100
  2. 2.9 + ? = 10
  3. 3.54 + ? = 100
  4. 4.76 + ? = 100
  5. 5.34 + ? = 100
  6. 6.31 + ? = 100
  7. 7.1 + ? = 10
  8. 8.89 + ? = 100
  9. 9.5 + ? = 10
  10. 10.7 + ? = 10
  11. 11.6 + ? = 10
  12. 12.41 + ? = 100
  13. 13.75 + ? = 100
  14. 14.8 + ? = 10
  15. 15.33 + ? = 100
  16. 16.2 + ? = 10
  17. 17.59 + ? = 100
  18. 18.17 + ? = 100
  19. 19.65 + ? = 100
  20. 20.63 + ? = 100
  21. 21.16 + ? = 100
  22. 22.62 + ? = 100
  23. 23.15 + ? = 100
  24. 24.85 + ? = 100
  25. 25.55 + ? = 100
  26. 26.4 + ? = 10
  27. 27.23 + ? = 100
  28. 28.56 + ? = 100
  29. 29.50 + ? = 100
  30. 30.73 + ? = 100
  31. 31.22 + ? = 100
  32. 32.51 + ? = 100
  33. 33.81 + ? = 100
  34. 34.43 + ? = 100
  35. 35.3 + ? = 10
  36. 36.24 + ? = 100
  37. 37.37 + ? = 100
  38. 38.19 + ? = 100
  39. 39.35 + ? = 100
  40. 40.58 + ? = 100

Answer key

  1. 82
  2. 1
  3. 46
  4. 24
  5. 66
  6. 69
  7. 9
  8. 11
  9. 5
  10. 3
  11. 4
  12. 59
  13. 25
  14. 2
  15. 67
  16. 8
  17. 41
  18. 83
  19. 35
  20. 37
  21. 84
  22. 38
  23. 85
  24. 15
  25. 45
  26. 6
  27. 77
  28. 44
  29. 50
  30. 27
  31. 78
  32. 49
  33. 19
  34. 57
  35. 7
  36. 76
  37. 63
  38. 81
  39. 65
  40. 42

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