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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 964 · 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. 1.1 + ? = 10
  2. 2.3 + ? = 10
  3. 3.40 + ? = 100
  4. 4.6 + ? = 10
  5. 5.8 + ? = 10
  6. 6.7 + ? = 10
  7. 7.47 + ? = 100
  8. 8.38 + ? = 100
  9. 9.5 + ? = 10
  10. 10.9 + ? = 10
  11. 11.89 + ? = 100
  12. 12.49 + ? = 100
  13. 13.16 + ? = 100
  14. 14.18 + ? = 100
  15. 15.67 + ? = 100
  16. 16.11 + ? = 100
  17. 17.2 + ? = 10
  18. 18.88 + ? = 100
  19. 19.56 + ? = 100
  20. 20.39 + ? = 100
  21. 21.43 + ? = 100
  22. 22.15 + ? = 100
  23. 23.29 + ? = 100
  24. 24.33 + ? = 100
  25. 25.22 + ? = 100
  26. 26.72 + ? = 100
  27. 27.36 + ? = 100
  28. 28.74 + ? = 100
  29. 29.71 + ? = 100
  30. 30.81 + ? = 100
  31. 31.4 + ? = 10
  32. 32.73 + ? = 100
  33. 33.66 + ? = 100
  34. 34.85 + ? = 100
  35. 35.68 + ? = 100
  36. 36.59 + ? = 100
  37. 37.70 + ? = 100
  38. 38.14 + ? = 100
  39. 39.41 + ? = 100
  40. 40.25 + ? = 100

Answer key

  1. 9
  2. 7
  3. 60
  4. 4
  5. 2
  6. 3
  7. 53
  8. 62
  9. 5
  10. 1
  11. 11
  12. 51
  13. 84
  14. 82
  15. 33
  16. 89
  17. 8
  18. 12
  19. 44
  20. 61
  21. 57
  22. 85
  23. 71
  24. 67
  25. 78
  26. 28
  27. 64
  28. 26
  29. 29
  30. 19
  31. 6
  32. 27
  33. 34
  34. 15
  35. 32
  36. 41
  37. 30
  38. 86
  39. 59
  40. 75

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