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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 513 · 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. 1.61 + ? = 100
  2. 2.7 + ? = 10
  3. 3.51 + ? = 100
  4. 4.65 + ? = 100
  5. 5.44 + ? = 100
  6. 6.53 + ? = 100
  7. 7.20 + ? = 100
  8. 8.1 + ? = 10
  9. 9.2 + ? = 10
  10. 10.4 + ? = 10
  11. 11.14 + ? = 100
  12. 12.3 + ? = 10
  13. 13.26 + ? = 100
  14. 14.40 + ? = 100
  15. 15.85 + ? = 100
  16. 16.48 + ? = 100
  17. 17.32 + ? = 100
  18. 18.87 + ? = 100
  19. 19.19 + ? = 100
  20. 20.89 + ? = 100
  21. 21.34 + ? = 100
  22. 22.5 + ? = 10
  23. 23.58 + ? = 100
  24. 24.46 + ? = 100
  25. 25.57 + ? = 100
  26. 26.9 + ? = 10
  27. 27.88 + ? = 100
  28. 28.70 + ? = 100
  29. 29.84 + ? = 100
  30. 30.13 + ? = 100
  31. 31.82 + ? = 100
  32. 32.6 + ? = 10
  33. 33.12 + ? = 100
  34. 34.64 + ? = 100
  35. 35.49 + ? = 100
  36. 36.18 + ? = 100
  37. 37.86 + ? = 100
  38. 38.35 + ? = 100
  39. 39.81 + ? = 100
  40. 40.78 + ? = 100

Answer key

  1. 39
  2. 3
  3. 49
  4. 35
  5. 56
  6. 47
  7. 80
  8. 9
  9. 8
  10. 6
  11. 86
  12. 7
  13. 74
  14. 60
  15. 15
  16. 52
  17. 68
  18. 13
  19. 81
  20. 11
  21. 66
  22. 5
  23. 42
  24. 54
  25. 43
  26. 1
  27. 12
  28. 30
  29. 16
  30. 87
  31. 18
  32. 4
  33. 88
  34. 36
  35. 51
  36. 82
  37. 14
  38. 65
  39. 19
  40. 22

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