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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 206 · 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. 1.26 + ? = 100
  2. 2.30 + ? = 100
  3. 3.1 + ? = 10
  4. 4.78 + ? = 100
  5. 5.29 + ? = 100
  6. 6.7 + ? = 10
  7. 7.28 + ? = 100
  8. 8.62 + ? = 100
  9. 9.16 + ? = 100
  10. 10.22 + ? = 100
  11. 11.13 + ? = 100
  12. 12.74 + ? = 100
  13. 13.27 + ? = 100
  14. 14.5 + ? = 10
  15. 15.59 + ? = 100
  16. 16.53 + ? = 100
  17. 17.2 + ? = 10
  18. 18.41 + ? = 100
  19. 19.9 + ? = 10
  20. 20.3 + ? = 10
  21. 21.33 + ? = 100
  22. 22.64 + ? = 100
  23. 23.4 + ? = 10
  24. 24.6 + ? = 10
  25. 25.87 + ? = 100
  26. 26.8 + ? = 10
  27. 27.44 + ? = 100
  28. 28.60 + ? = 100
  29. 29.85 + ? = 100
  30. 30.81 + ? = 100
  31. 31.72 + ? = 100
  32. 32.31 + ? = 100
  33. 33.35 + ? = 100
  34. 34.36 + ? = 100
  35. 35.39 + ? = 100
  36. 36.20 + ? = 100
  37. 37.11 + ? = 100
  38. 38.84 + ? = 100
  39. 39.37 + ? = 100
  40. 40.14 + ? = 100

Answer key

  1. 74
  2. 70
  3. 9
  4. 22
  5. 71
  6. 3
  7. 72
  8. 38
  9. 84
  10. 78
  11. 87
  12. 26
  13. 73
  14. 5
  15. 41
  16. 47
  17. 8
  18. 59
  19. 1
  20. 7
  21. 67
  22. 36
  23. 6
  24. 4
  25. 13
  26. 2
  27. 56
  28. 40
  29. 15
  30. 19
  31. 28
  32. 69
  33. 65
  34. 64
  35. 61
  36. 80
  37. 89
  38. 16
  39. 63
  40. 86

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