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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 704 · 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. 1.9 + ? = 10
  2. 2.84 + ? = 100
  3. 3.24 + ? = 100
  4. 4.36 + ? = 100
  5. 5.11 + ? = 100
  6. 6.66 + ? = 100
  7. 7.16 + ? = 100
  8. 8.1 + ? = 10
  9. 9.53 + ? = 100
  10. 10.78 + ? = 100
  11. 11.5 + ? = 10
  12. 12.23 + ? = 100
  13. 13.73 + ? = 100
  14. 14.21 + ? = 100
  15. 15.28 + ? = 100
  16. 16.3 + ? = 10
  17. 17.37 + ? = 100
  18. 18.59 + ? = 100
  19. 19.18 + ? = 100
  20. 20.62 + ? = 100
  21. 21.15 + ? = 100
  22. 22.4 + ? = 10
  23. 23.27 + ? = 100
  24. 24.85 + ? = 100
  25. 25.30 + ? = 100
  26. 26.42 + ? = 100
  27. 27.22 + ? = 100
  28. 28.6 + ? = 10
  29. 29.40 + ? = 100
  30. 30.44 + ? = 100
  31. 31.2 + ? = 10
  32. 32.50 + ? = 100
  33. 33.64 + ? = 100
  34. 34.8 + ? = 10
  35. 35.41 + ? = 100
  36. 36.7 + ? = 10
  37. 37.77 + ? = 100
  38. 38.79 + ? = 100
  39. 39.58 + ? = 100
  40. 40.68 + ? = 100

Answer key

  1. 1
  2. 16
  3. 76
  4. 64
  5. 89
  6. 34
  7. 84
  8. 9
  9. 47
  10. 22
  11. 5
  12. 77
  13. 27
  14. 79
  15. 72
  16. 7
  17. 63
  18. 41
  19. 82
  20. 38
  21. 85
  22. 6
  23. 73
  24. 15
  25. 70
  26. 58
  27. 78
  28. 4
  29. 60
  30. 56
  31. 8
  32. 50
  33. 36
  34. 2
  35. 59
  36. 3
  37. 23
  38. 21
  39. 42
  40. 32

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