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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 28 · 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. 2.42 + ? = 100
  3. 3.77 + ? = 100
  4. 4.56 + ? = 100
  5. 5.8 + ? = 10
  6. 6.80 + ? = 100
  7. 7.5 + ? = 10
  8. 8.59 + ? = 100
  9. 9.4 + ? = 10
  10. 10.69 + ? = 100
  11. 11.27 + ? = 100
  12. 12.81 + ? = 100
  13. 13.63 + ? = 100
  14. 14.53 + ? = 100
  15. 15.85 + ? = 100
  16. 16.66 + ? = 100
  17. 17.45 + ? = 100
  18. 18.1 + ? = 10
  19. 19.43 + ? = 100
  20. 20.3 + ? = 10
  21. 21.9 + ? = 10
  22. 22.22 + ? = 100
  23. 23.6 + ? = 10
  24. 24.46 + ? = 100
  25. 25.82 + ? = 100
  26. 26.24 + ? = 100
  27. 27.19 + ? = 100
  28. 28.49 + ? = 100
  29. 29.28 + ? = 100
  30. 30.86 + ? = 100
  31. 31.29 + ? = 100
  32. 32.32 + ? = 100
  33. 33.13 + ? = 100
  34. 34.87 + ? = 100
  35. 35.2 + ? = 10
  36. 36.21 + ? = 100
  37. 37.17 + ? = 100
  38. 38.33 + ? = 100
  39. 39.37 + ? = 100
  40. 40.39 + ? = 100

Answer key

  1. 3
  2. 58
  3. 23
  4. 44
  5. 2
  6. 20
  7. 5
  8. 41
  9. 6
  10. 31
  11. 73
  12. 19
  13. 37
  14. 47
  15. 15
  16. 34
  17. 55
  18. 9
  19. 57
  20. 7
  21. 1
  22. 78
  23. 4
  24. 54
  25. 18
  26. 76
  27. 81
  28. 51
  29. 72
  30. 14
  31. 71
  32. 68
  33. 87
  34. 13
  35. 8
  36. 79
  37. 83
  38. 67
  39. 63
  40. 61

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