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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 628 · 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. 1.24 + ? = 100
  2. 2.41 + ? = 100
  3. 3.4 + ? = 10
  4. 4.47 + ? = 100
  5. 5.7 + ? = 10
  6. 6.6 + ? = 10
  7. 7.69 + ? = 100
  8. 8.8 + ? = 10
  9. 9.9 + ? = 10
  10. 10.59 + ? = 100
  11. 11.48 + ? = 100
  12. 12.16 + ? = 100
  13. 13.79 + ? = 100
  14. 14.55 + ? = 100
  15. 15.2 + ? = 10
  16. 16.50 + ? = 100
  17. 17.45 + ? = 100
  18. 18.3 + ? = 10
  19. 19.81 + ? = 100
  20. 20.46 + ? = 100
  21. 21.31 + ? = 100
  22. 22.1 + ? = 10
  23. 23.56 + ? = 100
  24. 24.40 + ? = 100
  25. 25.14 + ? = 100
  26. 26.54 + ? = 100
  27. 27.80 + ? = 100
  28. 28.13 + ? = 100
  29. 29.15 + ? = 100
  30. 30.35 + ? = 100
  31. 31.86 + ? = 100
  32. 32.51 + ? = 100
  33. 33.44 + ? = 100
  34. 34.28 + ? = 100
  35. 35.70 + ? = 100
  36. 36.11 + ? = 100
  37. 37.75 + ? = 100
  38. 38.36 + ? = 100
  39. 39.17 + ? = 100
  40. 40.58 + ? = 100

Answer key

  1. 76
  2. 59
  3. 6
  4. 53
  5. 3
  6. 4
  7. 31
  8. 2
  9. 1
  10. 41
  11. 52
  12. 84
  13. 21
  14. 45
  15. 8
  16. 50
  17. 55
  18. 7
  19. 19
  20. 54
  21. 69
  22. 9
  23. 44
  24. 60
  25. 86
  26. 46
  27. 20
  28. 87
  29. 85
  30. 65
  31. 14
  32. 49
  33. 56
  34. 72
  35. 30
  36. 89
  37. 25
  38. 64
  39. 83
  40. 42

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