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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 936 · 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. 1.29 + ? = 100
  2. 2.7 + ? = 10
  3. 3.1 + ? = 10
  4. 4.76 + ? = 100
  5. 5.64 + ? = 100
  6. 6.59 + ? = 100
  7. 7.42 + ? = 100
  8. 8.50 + ? = 100
  9. 9.3 + ? = 10
  10. 10.85 + ? = 100
  11. 11.19 + ? = 100
  12. 12.25 + ? = 100
  13. 13.34 + ? = 100
  14. 14.4 + ? = 10
  15. 15.80 + ? = 100
  16. 16.6 + ? = 10
  17. 17.83 + ? = 100
  18. 18.49 + ? = 100
  19. 19.8 + ? = 10
  20. 20.9 + ? = 10
  21. 21.27 + ? = 100
  22. 22.36 + ? = 100
  23. 23.61 + ? = 100
  24. 24.16 + ? = 100
  25. 25.23 + ? = 100
  26. 26.47 + ? = 100
  27. 27.70 + ? = 100
  28. 28.18 + ? = 100
  29. 29.2 + ? = 10
  30. 30.87 + ? = 100
  31. 31.45 + ? = 100
  32. 32.41 + ? = 100
  33. 33.21 + ? = 100
  34. 34.5 + ? = 10
  35. 35.82 + ? = 100
  36. 36.39 + ? = 100
  37. 37.66 + ? = 100
  38. 38.89 + ? = 100
  39. 39.35 + ? = 100
  40. 40.43 + ? = 100

Answer key

  1. 71
  2. 3
  3. 9
  4. 24
  5. 36
  6. 41
  7. 58
  8. 50
  9. 7
  10. 15
  11. 81
  12. 75
  13. 66
  14. 6
  15. 20
  16. 4
  17. 17
  18. 51
  19. 2
  20. 1
  21. 73
  22. 64
  23. 39
  24. 84
  25. 77
  26. 53
  27. 30
  28. 82
  29. 8
  30. 13
  31. 55
  32. 59
  33. 79
  34. 5
  35. 18
  36. 61
  37. 34
  38. 11
  39. 65
  40. 57

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