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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 738 · 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. 2.17 + ? = 100
  3. 3.6 + ? = 10
  4. 4.8 + ? = 10
  5. 5.89 + ? = 100
  6. 6.1 + ? = 10
  7. 7.74 + ? = 100
  8. 8.18 + ? = 100
  9. 9.67 + ? = 100
  10. 10.79 + ? = 100
  11. 11.63 + ? = 100
  12. 12.4 + ? = 10
  13. 13.37 + ? = 100
  14. 14.69 + ? = 100
  15. 15.36 + ? = 100
  16. 16.24 + ? = 100
  17. 17.5 + ? = 10
  18. 18.60 + ? = 100
  19. 19.3 + ? = 10
  20. 20.40 + ? = 100
  21. 21.77 + ? = 100
  22. 22.54 + ? = 100
  23. 23.75 + ? = 100
  24. 24.2 + ? = 10
  25. 25.12 + ? = 100
  26. 26.62 + ? = 100
  27. 27.9 + ? = 10
  28. 28.78 + ? = 100
  29. 29.22 + ? = 100
  30. 30.16 + ? = 100
  31. 31.33 + ? = 100
  32. 32.58 + ? = 100
  33. 33.35 + ? = 100
  34. 34.64 + ? = 100
  35. 35.20 + ? = 100
  36. 36.38 + ? = 100
  37. 37.73 + ? = 100
  38. 38.46 + ? = 100
  39. 39.28 + ? = 100
  40. 40.71 + ? = 100

Answer key

  1. 3
  2. 83
  3. 4
  4. 2
  5. 11
  6. 9
  7. 26
  8. 82
  9. 33
  10. 21
  11. 37
  12. 6
  13. 63
  14. 31
  15. 64
  16. 76
  17. 5
  18. 40
  19. 7
  20. 60
  21. 23
  22. 46
  23. 25
  24. 8
  25. 88
  26. 38
  27. 1
  28. 22
  29. 78
  30. 84
  31. 67
  32. 42
  33. 65
  34. 36
  35. 80
  36. 62
  37. 27
  38. 54
  39. 72
  40. 29

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