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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 427 · 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. 1.4 + ? = 10
  2. 2.11 + ? = 100
  3. 3.5 + ? = 10
  4. 4.29 + ? = 100
  5. 5.24 + ? = 100
  6. 6.3 + ? = 10
  7. 7.16 + ? = 100
  8. 8.15 + ? = 100
  9. 9.59 + ? = 100
  10. 10.70 + ? = 100
  11. 11.69 + ? = 100
  12. 12.28 + ? = 100
  13. 13.18 + ? = 100
  14. 14.66 + ? = 100
  15. 15.31 + ? = 100
  16. 16.72 + ? = 100
  17. 17.9 + ? = 10
  18. 18.27 + ? = 100
  19. 19.74 + ? = 100
  20. 20.1 + ? = 10
  21. 21.7 + ? = 10
  22. 22.8 + ? = 10
  23. 23.50 + ? = 100
  24. 24.32 + ? = 100
  25. 25.35 + ? = 100
  26. 26.22 + ? = 100
  27. 27.14 + ? = 100
  28. 28.48 + ? = 100
  29. 29.34 + ? = 100
  30. 30.88 + ? = 100
  31. 31.64 + ? = 100
  32. 32.75 + ? = 100
  33. 33.47 + ? = 100
  34. 34.2 + ? = 10
  35. 35.19 + ? = 100
  36. 36.21 + ? = 100
  37. 37.6 + ? = 10
  38. 38.46 + ? = 100
  39. 39.84 + ? = 100
  40. 40.20 + ? = 100

Answer key

  1. 6
  2. 89
  3. 5
  4. 71
  5. 76
  6. 7
  7. 84
  8. 85
  9. 41
  10. 30
  11. 31
  12. 72
  13. 82
  14. 34
  15. 69
  16. 28
  17. 1
  18. 73
  19. 26
  20. 9
  21. 3
  22. 2
  23. 50
  24. 68
  25. 65
  26. 78
  27. 86
  28. 52
  29. 66
  30. 12
  31. 36
  32. 25
  33. 53
  34. 8
  35. 81
  36. 79
  37. 4
  38. 54
  39. 16
  40. 80

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