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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 788 · 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. 1.13 + ? = 100
  2. 2.1 + ? = 10
  3. 3.2 + ? = 10
  4. 4.8 + ? = 10
  5. 5.6 + ? = 10
  6. 6.88 + ? = 100
  7. 7.5 + ? = 10
  8. 8.9 + ? = 10
  9. 9.4 + ? = 10
  10. 10.26 + ? = 100
  11. 11.34 + ? = 100
  12. 12.7 + ? = 10
  13. 13.40 + ? = 100
  14. 14.41 + ? = 100
  15. 15.56 + ? = 100
  16. 16.89 + ? = 100
  17. 17.33 + ? = 100
  18. 18.24 + ? = 100
  19. 19.11 + ? = 100
  20. 20.39 + ? = 100
  21. 21.85 + ? = 100
  22. 22.65 + ? = 100
  23. 23.73 + ? = 100
  24. 24.62 + ? = 100
  25. 25.78 + ? = 100
  26. 26.49 + ? = 100
  27. 27.21 + ? = 100
  28. 28.59 + ? = 100
  29. 29.83 + ? = 100
  30. 30.67 + ? = 100
  31. 31.27 + ? = 100
  32. 32.75 + ? = 100
  33. 33.22 + ? = 100
  34. 34.3 + ? = 10
  35. 35.45 + ? = 100
  36. 36.81 + ? = 100
  37. 37.55 + ? = 100
  38. 38.48 + ? = 100
  39. 39.25 + ? = 100
  40. 40.35 + ? = 100

Answer key

  1. 87
  2. 9
  3. 8
  4. 2
  5. 4
  6. 12
  7. 5
  8. 1
  9. 6
  10. 74
  11. 66
  12. 3
  13. 60
  14. 59
  15. 44
  16. 11
  17. 67
  18. 76
  19. 89
  20. 61
  21. 15
  22. 35
  23. 27
  24. 38
  25. 22
  26. 51
  27. 79
  28. 41
  29. 17
  30. 33
  31. 73
  32. 25
  33. 78
  34. 7
  35. 55
  36. 19
  37. 45
  38. 52
  39. 75
  40. 65

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