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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 191 · 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. 1.2 + ? = 10
  2. 2.24 + ? = 100
  3. 3.1 + ? = 10
  4. 4.35 + ? = 100
  5. 5.6 + ? = 10
  6. 6.8 + ? = 10
  7. 7.9 + ? = 10
  8. 8.33 + ? = 100
  9. 9.39 + ? = 100
  10. 10.5 + ? = 10
  11. 11.3 + ? = 10
  12. 12.19 + ? = 100
  13. 13.41 + ? = 100
  14. 14.17 + ? = 100
  15. 15.51 + ? = 100
  16. 16.7 + ? = 10
  17. 17.12 + ? = 100
  18. 18.27 + ? = 100
  19. 19.83 + ? = 100
  20. 20.13 + ? = 100
  21. 21.63 + ? = 100
  22. 22.70 + ? = 100
  23. 23.50 + ? = 100
  24. 24.28 + ? = 100
  25. 25.60 + ? = 100
  26. 26.14 + ? = 100
  27. 27.81 + ? = 100
  28. 28.54 + ? = 100
  29. 29.22 + ? = 100
  30. 30.88 + ? = 100
  31. 31.30 + ? = 100
  32. 32.4 + ? = 10
  33. 33.73 + ? = 100
  34. 34.78 + ? = 100
  35. 35.37 + ? = 100
  36. 36.65 + ? = 100
  37. 37.21 + ? = 100
  38. 38.74 + ? = 100
  39. 39.38 + ? = 100
  40. 40.43 + ? = 100

Answer key

  1. 8
  2. 76
  3. 9
  4. 65
  5. 4
  6. 2
  7. 1
  8. 67
  9. 61
  10. 5
  11. 7
  12. 81
  13. 59
  14. 83
  15. 49
  16. 3
  17. 88
  18. 73
  19. 17
  20. 87
  21. 37
  22. 30
  23. 50
  24. 72
  25. 40
  26. 86
  27. 19
  28. 46
  29. 78
  30. 12
  31. 70
  32. 6
  33. 27
  34. 22
  35. 63
  36. 35
  37. 79
  38. 26
  39. 62
  40. 57

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