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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 8 · 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. 1.20 + ? = 100
  2. 2.9 + ? = 10
  3. 3.8 + ? = 10
  4. 4.47 + ? = 100
  5. 5.5 + ? = 10
  6. 6.26 + ? = 100
  7. 7.60 + ? = 100
  8. 8.40 + ? = 100
  9. 9.3 + ? = 10
  10. 10.35 + ? = 100
  11. 11.6 + ? = 10
  12. 12.45 + ? = 100
  13. 13.2 + ? = 10
  14. 14.12 + ? = 100
  15. 15.23 + ? = 100
  16. 16.4 + ? = 10
  17. 17.33 + ? = 100
  18. 18.57 + ? = 100
  19. 19.17 + ? = 100
  20. 20.30 + ? = 100
  21. 21.7 + ? = 10
  22. 22.1 + ? = 10
  23. 23.65 + ? = 100
  24. 24.54 + ? = 100
  25. 25.27 + ? = 100
  26. 26.69 + ? = 100
  27. 27.72 + ? = 100
  28. 28.75 + ? = 100
  29. 29.14 + ? = 100
  30. 30.62 + ? = 100
  31. 31.24 + ? = 100
  32. 32.81 + ? = 100
  33. 33.71 + ? = 100
  34. 34.39 + ? = 100
  35. 35.70 + ? = 100
  36. 36.59 + ? = 100
  37. 37.79 + ? = 100
  38. 38.28 + ? = 100
  39. 39.22 + ? = 100
  40. 40.38 + ? = 100

Answer key

  1. 80
  2. 1
  3. 2
  4. 53
  5. 5
  6. 74
  7. 40
  8. 60
  9. 7
  10. 65
  11. 4
  12. 55
  13. 8
  14. 88
  15. 77
  16. 6
  17. 67
  18. 43
  19. 83
  20. 70
  21. 3
  22. 9
  23. 35
  24. 46
  25. 73
  26. 31
  27. 28
  28. 25
  29. 86
  30. 38
  31. 76
  32. 19
  33. 29
  34. 61
  35. 30
  36. 41
  37. 21
  38. 72
  39. 78
  40. 62

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