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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 661 · 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. 1.1 + ? = 10
  2. 2.59 + ? = 100
  3. 3.47 + ? = 100
  4. 4.3 + ? = 10
  5. 5.9 + ? = 10
  6. 6.4 + ? = 10
  7. 7.6 + ? = 10
  8. 8.38 + ? = 100
  9. 9.44 + ? = 100
  10. 10.7 + ? = 10
  11. 11.43 + ? = 100
  12. 12.31 + ? = 100
  13. 13.62 + ? = 100
  14. 14.13 + ? = 100
  15. 15.57 + ? = 100
  16. 16.78 + ? = 100
  17. 17.69 + ? = 100
  18. 18.5 + ? = 10
  19. 19.56 + ? = 100
  20. 20.2 + ? = 10
  21. 21.81 + ? = 100
  22. 22.39 + ? = 100
  23. 23.12 + ? = 100
  24. 24.8 + ? = 10
  25. 25.64 + ? = 100
  26. 26.28 + ? = 100
  27. 27.18 + ? = 100
  28. 28.22 + ? = 100
  29. 29.40 + ? = 100
  30. 30.27 + ? = 100
  31. 31.88 + ? = 100
  32. 32.29 + ? = 100
  33. 33.51 + ? = 100
  34. 34.66 + ? = 100
  35. 35.19 + ? = 100
  36. 36.83 + ? = 100
  37. 37.25 + ? = 100
  38. 38.48 + ? = 100
  39. 39.79 + ? = 100
  40. 40.80 + ? = 100

Answer key

  1. 9
  2. 41
  3. 53
  4. 7
  5. 1
  6. 6
  7. 4
  8. 62
  9. 56
  10. 3
  11. 57
  12. 69
  13. 38
  14. 87
  15. 43
  16. 22
  17. 31
  18. 5
  19. 44
  20. 8
  21. 19
  22. 61
  23. 88
  24. 2
  25. 36
  26. 72
  27. 82
  28. 78
  29. 60
  30. 73
  31. 12
  32. 71
  33. 49
  34. 34
  35. 81
  36. 17
  37. 75
  38. 52
  39. 21
  40. 20

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