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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 201 · 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. 2.41 + ? = 100
  3. 3.7 + ? = 10
  4. 4.81 + ? = 100
  5. 5.1 + ? = 10
  6. 6.53 + ? = 100
  7. 7.87 + ? = 100
  8. 8.6 + ? = 10
  9. 9.17 + ? = 100
  10. 10.13 + ? = 100
  11. 11.4 + ? = 10
  12. 12.16 + ? = 100
  13. 13.84 + ? = 100
  14. 14.40 + ? = 100
  15. 15.45 + ? = 100
  16. 16.78 + ? = 100
  17. 17.58 + ? = 100
  18. 18.8 + ? = 10
  19. 19.89 + ? = 100
  20. 20.72 + ? = 100
  21. 21.5 + ? = 10
  22. 22.2 + ? = 10
  23. 23.3 + ? = 10
  24. 24.86 + ? = 100
  25. 25.63 + ? = 100
  26. 26.35 + ? = 100
  27. 27.61 + ? = 100
  28. 28.88 + ? = 100
  29. 29.24 + ? = 100
  30. 30.47 + ? = 100
  31. 31.27 + ? = 100
  32. 32.25 + ? = 100
  33. 33.21 + ? = 100
  34. 34.70 + ? = 100
  35. 35.20 + ? = 100
  36. 36.14 + ? = 100
  37. 37.29 + ? = 100
  38. 38.30 + ? = 100
  39. 39.11 + ? = 100
  40. 40.75 + ? = 100

Answer key

  1. 1
  2. 59
  3. 3
  4. 19
  5. 9
  6. 47
  7. 13
  8. 4
  9. 83
  10. 87
  11. 6
  12. 84
  13. 16
  14. 60
  15. 55
  16. 22
  17. 42
  18. 2
  19. 11
  20. 28
  21. 5
  22. 8
  23. 7
  24. 14
  25. 37
  26. 65
  27. 39
  28. 12
  29. 76
  30. 53
  31. 73
  32. 75
  33. 79
  34. 30
  35. 80
  36. 86
  37. 71
  38. 70
  39. 89
  40. 25

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