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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 110 · 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. 2.64 + ? = 100
  3. 3.79 + ? = 100
  4. 4.29 + ? = 100
  5. 5.65 + ? = 100
  6. 6.12 + ? = 100
  7. 7.58 + ? = 100
  8. 8.9 + ? = 10
  9. 9.8 + ? = 10
  10. 10.20 + ? = 100
  11. 11.47 + ? = 100
  12. 12.4 + ? = 10
  13. 13.57 + ? = 100
  14. 14.33 + ? = 100
  15. 15.56 + ? = 100
  16. 16.83 + ? = 100
  17. 17.1 + ? = 10
  18. 18.59 + ? = 100
  19. 19.13 + ? = 100
  20. 20.2 + ? = 10
  21. 21.74 + ? = 100
  22. 22.89 + ? = 100
  23. 23.51 + ? = 100
  24. 24.77 + ? = 100
  25. 25.39 + ? = 100
  26. 26.27 + ? = 100
  27. 27.35 + ? = 100
  28. 28.45 + ? = 100
  29. 29.53 + ? = 100
  30. 30.31 + ? = 100
  31. 31.17 + ? = 100
  32. 32.6 + ? = 10
  33. 33.34 + ? = 100
  34. 34.30 + ? = 100
  35. 35.3 + ? = 10
  36. 36.19 + ? = 100
  37. 37.60 + ? = 100
  38. 38.71 + ? = 100
  39. 39.88 + ? = 100
  40. 40.38 + ? = 100

Answer key

  1. 3
  2. 36
  3. 21
  4. 71
  5. 35
  6. 88
  7. 42
  8. 1
  9. 2
  10. 80
  11. 53
  12. 6
  13. 43
  14. 67
  15. 44
  16. 17
  17. 9
  18. 41
  19. 87
  20. 8
  21. 26
  22. 11
  23. 49
  24. 23
  25. 61
  26. 73
  27. 65
  28. 55
  29. 47
  30. 69
  31. 83
  32. 4
  33. 66
  34. 70
  35. 7
  36. 81
  37. 40
  38. 29
  39. 12
  40. 62

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