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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 782 · 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. 1.7 + ? = 10
  2. 2.8 + ? = 10
  3. 3.14 + ? = 100
  4. 4.2 + ? = 10
  5. 5.63 + ? = 100
  6. 6.4 + ? = 10
  7. 7.69 + ? = 100
  8. 8.88 + ? = 100
  9. 9.36 + ? = 100
  10. 10.9 + ? = 10
  11. 11.41 + ? = 100
  12. 12.19 + ? = 100
  13. 13.33 + ? = 100
  14. 14.18 + ? = 100
  15. 15.3 + ? = 10
  16. 16.17 + ? = 100
  17. 17.82 + ? = 100
  18. 18.24 + ? = 100
  19. 19.5 + ? = 10
  20. 20.46 + ? = 100
  21. 21.26 + ? = 100
  22. 22.39 + ? = 100
  23. 23.27 + ? = 100
  24. 24.52 + ? = 100
  25. 25.89 + ? = 100
  26. 26.42 + ? = 100
  27. 27.31 + ? = 100
  28. 28.13 + ? = 100
  29. 29.12 + ? = 100
  30. 30.48 + ? = 100
  31. 31.15 + ? = 100
  32. 32.6 + ? = 10
  33. 33.73 + ? = 100
  34. 34.60 + ? = 100
  35. 35.74 + ? = 100
  36. 36.11 + ? = 100
  37. 37.45 + ? = 100
  38. 38.77 + ? = 100
  39. 39.35 + ? = 100
  40. 40.80 + ? = 100

Answer key

  1. 3
  2. 2
  3. 86
  4. 8
  5. 37
  6. 6
  7. 31
  8. 12
  9. 64
  10. 1
  11. 59
  12. 81
  13. 67
  14. 82
  15. 7
  16. 83
  17. 18
  18. 76
  19. 5
  20. 54
  21. 74
  22. 61
  23. 73
  24. 48
  25. 11
  26. 58
  27. 69
  28. 87
  29. 88
  30. 52
  31. 85
  32. 4
  33. 27
  34. 40
  35. 26
  36. 89
  37. 55
  38. 23
  39. 65
  40. 20

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