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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 336 · 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. 1.48 + ? = 100
  2. 2.5 + ? = 10
  3. 3.18 + ? = 100
  4. 4.8 + ? = 10
  5. 5.20 + ? = 100
  6. 6.19 + ? = 100
  7. 7.4 + ? = 10
  8. 8.22 + ? = 100
  9. 9.1 + ? = 10
  10. 10.9 + ? = 10
  11. 11.21 + ? = 100
  12. 12.82 + ? = 100
  13. 13.49 + ? = 100
  14. 14.24 + ? = 100
  15. 15.23 + ? = 100
  16. 16.16 + ? = 100
  17. 17.29 + ? = 100
  18. 18.17 + ? = 100
  19. 19.42 + ? = 100
  20. 20.13 + ? = 100
  21. 21.11 + ? = 100
  22. 22.85 + ? = 100
  23. 23.56 + ? = 100
  24. 24.2 + ? = 10
  25. 25.72 + ? = 100
  26. 26.75 + ? = 100
  27. 27.15 + ? = 100
  28. 28.26 + ? = 100
  29. 29.74 + ? = 100
  30. 30.7 + ? = 10
  31. 31.58 + ? = 100
  32. 32.3 + ? = 10
  33. 33.50 + ? = 100
  34. 34.65 + ? = 100
  35. 35.73 + ? = 100
  36. 36.70 + ? = 100
  37. 37.14 + ? = 100
  38. 38.87 + ? = 100
  39. 39.68 + ? = 100
  40. 40.80 + ? = 100

Answer key

  1. 52
  2. 5
  3. 82
  4. 2
  5. 80
  6. 81
  7. 6
  8. 78
  9. 9
  10. 1
  11. 79
  12. 18
  13. 51
  14. 76
  15. 77
  16. 84
  17. 71
  18. 83
  19. 58
  20. 87
  21. 89
  22. 15
  23. 44
  24. 8
  25. 28
  26. 25
  27. 85
  28. 74
  29. 26
  30. 3
  31. 42
  32. 7
  33. 50
  34. 35
  35. 27
  36. 30
  37. 86
  38. 13
  39. 32
  40. 20

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