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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 953 · 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. 1.38 + ? = 100
  2. 2.36 + ? = 100
  3. 3.5 + ? = 10
  4. 4.8 + ? = 10
  5. 5.73 + ? = 100
  6. 6.68 + ? = 100
  7. 7.30 + ? = 100
  8. 8.7 + ? = 10
  9. 9.40 + ? = 100
  10. 10.3 + ? = 10
  11. 11.9 + ? = 10
  12. 12.69 + ? = 100
  13. 13.4 + ? = 10
  14. 14.2 + ? = 10
  15. 15.85 + ? = 100
  16. 16.60 + ? = 100
  17. 17.15 + ? = 100
  18. 18.18 + ? = 100
  19. 19.28 + ? = 100
  20. 20.49 + ? = 100
  21. 21.11 + ? = 100
  22. 22.25 + ? = 100
  23. 23.33 + ? = 100
  24. 24.31 + ? = 100
  25. 25.20 + ? = 100
  26. 26.19 + ? = 100
  27. 27.47 + ? = 100
  28. 28.89 + ? = 100
  29. 29.82 + ? = 100
  30. 30.64 + ? = 100
  31. 31.41 + ? = 100
  32. 32.75 + ? = 100
  33. 33.22 + ? = 100
  34. 34.24 + ? = 100
  35. 35.79 + ? = 100
  36. 36.1 + ? = 10
  37. 37.80 + ? = 100
  38. 38.66 + ? = 100
  39. 39.59 + ? = 100
  40. 40.34 + ? = 100

Answer key

  1. 62
  2. 64
  3. 5
  4. 2
  5. 27
  6. 32
  7. 70
  8. 3
  9. 60
  10. 7
  11. 1
  12. 31
  13. 6
  14. 8
  15. 15
  16. 40
  17. 85
  18. 82
  19. 72
  20. 51
  21. 89
  22. 75
  23. 67
  24. 69
  25. 80
  26. 81
  27. 53
  28. 11
  29. 18
  30. 36
  31. 59
  32. 25
  33. 78
  34. 76
  35. 21
  36. 9
  37. 20
  38. 34
  39. 41
  40. 66

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