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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 663 · 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. 1.75 + ? = 100
  2. 2.56 + ? = 100
  3. 3.4 + ? = 10
  4. 4.59 + ? = 100
  5. 5.7 + ? = 10
  6. 6.9 + ? = 10
  7. 7.25 + ? = 100
  8. 8.6 + ? = 10
  9. 9.22 + ? = 100
  10. 10.19 + ? = 100
  11. 11.17 + ? = 100
  12. 12.61 + ? = 100
  13. 13.26 + ? = 100
  14. 14.5 + ? = 10
  15. 15.81 + ? = 100
  16. 16.11 + ? = 100
  17. 17.20 + ? = 100
  18. 18.3 + ? = 10
  19. 19.87 + ? = 100
  20. 20.23 + ? = 100
  21. 21.34 + ? = 100
  22. 22.31 + ? = 100
  23. 23.2 + ? = 10
  24. 24.21 + ? = 100
  25. 25.77 + ? = 100
  26. 26.1 + ? = 10
  27. 27.8 + ? = 10
  28. 28.74 + ? = 100
  29. 29.65 + ? = 100
  30. 30.14 + ? = 100
  31. 31.83 + ? = 100
  32. 32.71 + ? = 100
  33. 33.62 + ? = 100
  34. 34.84 + ? = 100
  35. 35.45 + ? = 100
  36. 36.40 + ? = 100
  37. 37.42 + ? = 100
  38. 38.33 + ? = 100
  39. 39.43 + ? = 100
  40. 40.63 + ? = 100

Answer key

  1. 25
  2. 44
  3. 6
  4. 41
  5. 3
  6. 1
  7. 75
  8. 4
  9. 78
  10. 81
  11. 83
  12. 39
  13. 74
  14. 5
  15. 19
  16. 89
  17. 80
  18. 7
  19. 13
  20. 77
  21. 66
  22. 69
  23. 8
  24. 79
  25. 23
  26. 9
  27. 2
  28. 26
  29. 35
  30. 86
  31. 17
  32. 29
  33. 38
  34. 16
  35. 55
  36. 60
  37. 58
  38. 67
  39. 57
  40. 37

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