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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 96 · 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. 1.7 + ? = 10
  2. 2.2 + ? = 10
  3. 3.16 + ? = 100
  4. 4.41 + ? = 100
  5. 5.20 + ? = 100
  6. 6.46 + ? = 100
  7. 7.81 + ? = 100
  8. 8.4 + ? = 10
  9. 9.73 + ? = 100
  10. 10.23 + ? = 100
  11. 11.62 + ? = 100
  12. 12.22 + ? = 100
  13. 13.6 + ? = 10
  14. 14.26 + ? = 100
  15. 15.5 + ? = 10
  16. 16.47 + ? = 100
  17. 17.9 + ? = 10
  18. 18.28 + ? = 100
  19. 19.15 + ? = 100
  20. 20.59 + ? = 100
  21. 21.40 + ? = 100
  22. 22.29 + ? = 100
  23. 23.75 + ? = 100
  24. 24.38 + ? = 100
  25. 25.19 + ? = 100
  26. 26.8 + ? = 10
  27. 27.84 + ? = 100
  28. 28.45 + ? = 100
  29. 29.3 + ? = 10
  30. 30.1 + ? = 10
  31. 31.69 + ? = 100
  32. 32.43 + ? = 100
  33. 33.78 + ? = 100
  34. 34.24 + ? = 100
  35. 35.42 + ? = 100
  36. 36.12 + ? = 100
  37. 37.30 + ? = 100
  38. 38.31 + ? = 100
  39. 39.61 + ? = 100
  40. 40.39 + ? = 100

Answer key

  1. 3
  2. 8
  3. 84
  4. 59
  5. 80
  6. 54
  7. 19
  8. 6
  9. 27
  10. 77
  11. 38
  12. 78
  13. 4
  14. 74
  15. 5
  16. 53
  17. 1
  18. 72
  19. 85
  20. 41
  21. 60
  22. 71
  23. 25
  24. 62
  25. 81
  26. 2
  27. 16
  28. 55
  29. 7
  30. 9
  31. 31
  32. 57
  33. 22
  34. 76
  35. 58
  36. 88
  37. 70
  38. 69
  39. 39
  40. 61

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