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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 362 · 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. 1.64 + ? = 100
  2. 2.8 + ? = 10
  3. 3.31 + ? = 100
  4. 4.6 + ? = 10
  5. 5.11 + ? = 100
  6. 6.3 + ? = 10
  7. 7.32 + ? = 100
  8. 8.1 + ? = 10
  9. 9.35 + ? = 100
  10. 10.13 + ? = 100
  11. 11.33 + ? = 100
  12. 12.52 + ? = 100
  13. 13.9 + ? = 10
  14. 14.5 + ? = 10
  15. 15.66 + ? = 100
  16. 16.17 + ? = 100
  17. 17.7 + ? = 10
  18. 18.2 + ? = 10
  19. 19.67 + ? = 100
  20. 20.85 + ? = 100
  21. 21.61 + ? = 100
  22. 22.24 + ? = 100
  23. 23.62 + ? = 100
  24. 24.84 + ? = 100
  25. 25.86 + ? = 100
  26. 26.16 + ? = 100
  27. 27.19 + ? = 100
  28. 28.88 + ? = 100
  29. 29.34 + ? = 100
  30. 30.57 + ? = 100
  31. 31.59 + ? = 100
  32. 32.12 + ? = 100
  33. 33.25 + ? = 100
  34. 34.72 + ? = 100
  35. 35.36 + ? = 100
  36. 36.74 + ? = 100
  37. 37.77 + ? = 100
  38. 38.48 + ? = 100
  39. 39.4 + ? = 10
  40. 40.21 + ? = 100

Answer key

  1. 36
  2. 2
  3. 69
  4. 4
  5. 89
  6. 7
  7. 68
  8. 9
  9. 65
  10. 87
  11. 67
  12. 48
  13. 1
  14. 5
  15. 34
  16. 83
  17. 3
  18. 8
  19. 33
  20. 15
  21. 39
  22. 76
  23. 38
  24. 16
  25. 14
  26. 84
  27. 81
  28. 12
  29. 66
  30. 43
  31. 41
  32. 88
  33. 75
  34. 28
  35. 64
  36. 26
  37. 23
  38. 52
  39. 6
  40. 79

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