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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 37 · 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. 1.36 + ? = 100
  2. 2.9 + ? = 10
  3. 3.8 + ? = 10
  4. 4.3 + ? = 10
  5. 5.11 + ? = 100
  6. 6.4 + ? = 10
  7. 7.5 + ? = 10
  8. 8.2 + ? = 10
  9. 9.7 + ? = 10
  10. 10.6 + ? = 10
  11. 11.33 + ? = 100
  12. 12.86 + ? = 100
  13. 13.77 + ? = 100
  14. 14.67 + ? = 100
  15. 15.1 + ? = 10
  16. 16.69 + ? = 100
  17. 17.21 + ? = 100
  18. 18.54 + ? = 100
  19. 19.82 + ? = 100
  20. 20.89 + ? = 100
  21. 21.31 + ? = 100
  22. 22.25 + ? = 100
  23. 23.42 + ? = 100
  24. 24.73 + ? = 100
  25. 25.59 + ? = 100
  26. 26.24 + ? = 100
  27. 27.28 + ? = 100
  28. 28.68 + ? = 100
  29. 29.15 + ? = 100
  30. 30.23 + ? = 100
  31. 31.57 + ? = 100
  32. 32.30 + ? = 100
  33. 33.40 + ? = 100
  34. 34.84 + ? = 100
  35. 35.35 + ? = 100
  36. 36.34 + ? = 100
  37. 37.79 + ? = 100
  38. 38.39 + ? = 100
  39. 39.44 + ? = 100
  40. 40.26 + ? = 100

Answer key

  1. 64
  2. 1
  3. 2
  4. 7
  5. 89
  6. 6
  7. 5
  8. 8
  9. 3
  10. 4
  11. 67
  12. 14
  13. 23
  14. 33
  15. 9
  16. 31
  17. 79
  18. 46
  19. 18
  20. 11
  21. 69
  22. 75
  23. 58
  24. 27
  25. 41
  26. 76
  27. 72
  28. 32
  29. 85
  30. 77
  31. 43
  32. 70
  33. 60
  34. 16
  35. 65
  36. 66
  37. 21
  38. 61
  39. 56
  40. 74

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