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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 753 · 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. 1.53 + ? = 100
  2. 2.89 + ? = 100
  3. 3.2 + ? = 10
  4. 4.1 + ? = 10
  5. 5.4 + ? = 10
  6. 6.32 + ? = 100
  7. 7.86 + ? = 100
  8. 8.82 + ? = 100
  9. 9.52 + ? = 100
  10. 10.5 + ? = 10
  11. 11.34 + ? = 100
  12. 12.60 + ? = 100
  13. 13.9 + ? = 10
  14. 14.6 + ? = 10
  15. 15.78 + ? = 100
  16. 16.7 + ? = 10
  17. 17.45 + ? = 100
  18. 18.35 + ? = 100
  19. 19.77 + ? = 100
  20. 20.47 + ? = 100
  21. 21.70 + ? = 100
  22. 22.25 + ? = 100
  23. 23.69 + ? = 100
  24. 24.38 + ? = 100
  25. 25.49 + ? = 100
  26. 26.31 + ? = 100
  27. 27.79 + ? = 100
  28. 28.55 + ? = 100
  29. 29.57 + ? = 100
  30. 30.20 + ? = 100
  31. 31.21 + ? = 100
  32. 32.3 + ? = 10
  33. 33.40 + ? = 100
  34. 34.84 + ? = 100
  35. 35.64 + ? = 100
  36. 36.24 + ? = 100
  37. 37.65 + ? = 100
  38. 38.8 + ? = 10
  39. 39.16 + ? = 100
  40. 40.73 + ? = 100

Answer key

  1. 47
  2. 11
  3. 8
  4. 9
  5. 6
  6. 68
  7. 14
  8. 18
  9. 48
  10. 5
  11. 66
  12. 40
  13. 1
  14. 4
  15. 22
  16. 3
  17. 55
  18. 65
  19. 23
  20. 53
  21. 30
  22. 75
  23. 31
  24. 62
  25. 51
  26. 69
  27. 21
  28. 45
  29. 43
  30. 80
  31. 79
  32. 7
  33. 60
  34. 16
  35. 36
  36. 76
  37. 35
  38. 2
  39. 84
  40. 27

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