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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 370 · 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. 1.63 + ? = 100
  2. 2.8 + ? = 10
  3. 3.58 + ? = 100
  4. 4.24 + ? = 100
  5. 5.46 + ? = 100
  6. 6.2 + ? = 10
  7. 7.3 + ? = 10
  8. 8.82 + ? = 100
  9. 9.85 + ? = 100
  10. 10.5 + ? = 10
  11. 11.4 + ? = 10
  12. 12.1 + ? = 10
  13. 13.65 + ? = 100
  14. 14.39 + ? = 100
  15. 15.7 + ? = 10
  16. 16.22 + ? = 100
  17. 17.36 + ? = 100
  18. 18.35 + ? = 100
  19. 19.6 + ? = 10
  20. 20.50 + ? = 100
  21. 21.9 + ? = 10
  22. 22.14 + ? = 100
  23. 23.66 + ? = 100
  24. 24.81 + ? = 100
  25. 25.62 + ? = 100
  26. 26.21 + ? = 100
  27. 27.47 + ? = 100
  28. 28.17 + ? = 100
  29. 29.45 + ? = 100
  30. 30.27 + ? = 100
  31. 31.12 + ? = 100
  32. 32.68 + ? = 100
  33. 33.18 + ? = 100
  34. 34.88 + ? = 100
  35. 35.11 + ? = 100
  36. 36.59 + ? = 100
  37. 37.77 + ? = 100
  38. 38.41 + ? = 100
  39. 39.73 + ? = 100
  40. 40.86 + ? = 100

Answer key

  1. 37
  2. 2
  3. 42
  4. 76
  5. 54
  6. 8
  7. 7
  8. 18
  9. 15
  10. 5
  11. 6
  12. 9
  13. 35
  14. 61
  15. 3
  16. 78
  17. 64
  18. 65
  19. 4
  20. 50
  21. 1
  22. 86
  23. 34
  24. 19
  25. 38
  26. 79
  27. 53
  28. 83
  29. 55
  30. 73
  31. 88
  32. 32
  33. 82
  34. 12
  35. 89
  36. 41
  37. 23
  38. 59
  39. 27
  40. 14

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