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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 400 · 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. 1.41 + ? = 100
  2. 2.85 + ? = 100
  3. 3.2 + ? = 10
  4. 4.5 + ? = 10
  5. 5.36 + ? = 100
  6. 6.8 + ? = 10
  7. 7.1 + ? = 10
  8. 8.7 + ? = 10
  9. 9.4 + ? = 10
  10. 10.54 + ? = 100
  11. 11.6 + ? = 10
  12. 12.61 + ? = 100
  13. 13.11 + ? = 100
  14. 14.57 + ? = 100
  15. 15.38 + ? = 100
  16. 16.13 + ? = 100
  17. 17.28 + ? = 100
  18. 18.31 + ? = 100
  19. 19.24 + ? = 100
  20. 20.27 + ? = 100
  21. 21.3 + ? = 10
  22. 22.14 + ? = 100
  23. 23.66 + ? = 100
  24. 24.71 + ? = 100
  25. 25.53 + ? = 100
  26. 26.26 + ? = 100
  27. 27.21 + ? = 100
  28. 28.68 + ? = 100
  29. 29.73 + ? = 100
  30. 30.46 + ? = 100
  31. 31.67 + ? = 100
  32. 32.74 + ? = 100
  33. 33.60 + ? = 100
  34. 34.39 + ? = 100
  35. 35.82 + ? = 100
  36. 36.56 + ? = 100
  37. 37.83 + ? = 100
  38. 38.19 + ? = 100
  39. 39.49 + ? = 100
  40. 40.40 + ? = 100

Answer key

  1. 59
  2. 15
  3. 8
  4. 5
  5. 64
  6. 2
  7. 9
  8. 3
  9. 6
  10. 46
  11. 4
  12. 39
  13. 89
  14. 43
  15. 62
  16. 87
  17. 72
  18. 69
  19. 76
  20. 73
  21. 7
  22. 86
  23. 34
  24. 29
  25. 47
  26. 74
  27. 79
  28. 32
  29. 27
  30. 54
  31. 33
  32. 26
  33. 40
  34. 61
  35. 18
  36. 44
  37. 17
  38. 81
  39. 51
  40. 60

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