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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 985 · 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. 1.3 + ? = 10
  2. 2.12 + ? = 100
  3. 3.7 + ? = 10
  4. 4.2 + ? = 10
  5. 5.59 + ? = 100
  6. 6.9 + ? = 10
  7. 7.6 + ? = 10
  8. 8.44 + ? = 100
  9. 9.17 + ? = 100
  10. 10.48 + ? = 100
  11. 11.71 + ? = 100
  12. 12.4 + ? = 10
  13. 13.39 + ? = 100
  14. 14.80 + ? = 100
  15. 15.79 + ? = 100
  16. 16.74 + ? = 100
  17. 17.29 + ? = 100
  18. 18.1 + ? = 10
  19. 19.47 + ? = 100
  20. 20.8 + ? = 10
  21. 21.73 + ? = 100
  22. 22.76 + ? = 100
  23. 23.24 + ? = 100
  24. 24.36 + ? = 100
  25. 25.5 + ? = 10
  26. 26.31 + ? = 100
  27. 27.34 + ? = 100
  28. 28.77 + ? = 100
  29. 29.22 + ? = 100
  30. 30.60 + ? = 100
  31. 31.64 + ? = 100
  32. 32.72 + ? = 100
  33. 33.40 + ? = 100
  34. 34.28 + ? = 100
  35. 35.25 + ? = 100
  36. 36.89 + ? = 100
  37. 37.13 + ? = 100
  38. 38.50 + ? = 100
  39. 39.84 + ? = 100
  40. 40.46 + ? = 100

Answer key

  1. 7
  2. 88
  3. 3
  4. 8
  5. 41
  6. 1
  7. 4
  8. 56
  9. 83
  10. 52
  11. 29
  12. 6
  13. 61
  14. 20
  15. 21
  16. 26
  17. 71
  18. 9
  19. 53
  20. 2
  21. 27
  22. 24
  23. 76
  24. 64
  25. 5
  26. 69
  27. 66
  28. 23
  29. 78
  30. 40
  31. 36
  32. 28
  33. 60
  34. 72
  35. 75
  36. 11
  37. 87
  38. 50
  39. 16
  40. 54

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