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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 889 · 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. 1.44 + ? = 100
  2. 2.6 + ? = 10
  3. 3.9 + ? = 10
  4. 4.69 + ? = 100
  5. 5.8 + ? = 10
  6. 6.1 + ? = 10
  7. 7.3 + ? = 10
  8. 8.30 + ? = 100
  9. 9.84 + ? = 100
  10. 10.89 + ? = 100
  11. 11.13 + ? = 100
  12. 12.64 + ? = 100
  13. 13.4 + ? = 10
  14. 14.82 + ? = 100
  15. 15.33 + ? = 100
  16. 16.2 + ? = 10
  17. 17.19 + ? = 100
  18. 18.26 + ? = 100
  19. 19.40 + ? = 100
  20. 20.5 + ? = 10
  21. 21.63 + ? = 100
  22. 22.79 + ? = 100
  23. 23.66 + ? = 100
  24. 24.15 + ? = 100
  25. 25.31 + ? = 100
  26. 26.20 + ? = 100
  27. 27.23 + ? = 100
  28. 28.75 + ? = 100
  29. 29.22 + ? = 100
  30. 30.49 + ? = 100
  31. 31.74 + ? = 100
  32. 32.59 + ? = 100
  33. 33.87 + ? = 100
  34. 34.42 + ? = 100
  35. 35.32 + ? = 100
  36. 36.81 + ? = 100
  37. 37.12 + ? = 100
  38. 38.67 + ? = 100
  39. 39.85 + ? = 100
  40. 40.16 + ? = 100

Answer key

  1. 56
  2. 4
  3. 1
  4. 31
  5. 2
  6. 9
  7. 7
  8. 70
  9. 16
  10. 11
  11. 87
  12. 36
  13. 6
  14. 18
  15. 67
  16. 8
  17. 81
  18. 74
  19. 60
  20. 5
  21. 37
  22. 21
  23. 34
  24. 85
  25. 69
  26. 80
  27. 77
  28. 25
  29. 78
  30. 51
  31. 26
  32. 41
  33. 13
  34. 58
  35. 68
  36. 19
  37. 88
  38. 33
  39. 15
  40. 84

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