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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 662 · 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. 2.74 + ? = 100
  3. 3.48 + ? = 100
  4. 4.19 + ? = 100
  5. 5.2 + ? = 10
  6. 6.7 + ? = 10
  7. 7.3 + ? = 10
  8. 8.17 + ? = 100
  9. 9.5 + ? = 10
  10. 10.46 + ? = 100
  11. 11.67 + ? = 100
  12. 12.6 + ? = 10
  13. 13.36 + ? = 100
  14. 14.34 + ? = 100
  15. 15.8 + ? = 10
  16. 16.14 + ? = 100
  17. 17.59 + ? = 100
  18. 18.4 + ? = 10
  19. 19.66 + ? = 100
  20. 20.38 + ? = 100
  21. 21.52 + ? = 100
  22. 22.20 + ? = 100
  23. 23.25 + ? = 100
  24. 24.50 + ? = 100
  25. 25.9 + ? = 10
  26. 26.39 + ? = 100
  27. 27.26 + ? = 100
  28. 28.43 + ? = 100
  29. 29.40 + ? = 100
  30. 30.83 + ? = 100
  31. 31.24 + ? = 100
  32. 32.57 + ? = 100
  33. 33.61 + ? = 100
  34. 34.22 + ? = 100
  35. 35.27 + ? = 100
  36. 36.81 + ? = 100
  37. 37.86 + ? = 100
  38. 38.75 + ? = 100
  39. 39.64 + ? = 100
  40. 40.79 + ? = 100

Answer key

  1. 9
  2. 26
  3. 52
  4. 81
  5. 8
  6. 3
  7. 7
  8. 83
  9. 5
  10. 54
  11. 33
  12. 4
  13. 64
  14. 66
  15. 2
  16. 86
  17. 41
  18. 6
  19. 34
  20. 62
  21. 48
  22. 80
  23. 75
  24. 50
  25. 1
  26. 61
  27. 74
  28. 57
  29. 60
  30. 17
  31. 76
  32. 43
  33. 39
  34. 78
  35. 73
  36. 19
  37. 14
  38. 25
  39. 36
  40. 21

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