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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 976 · 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. 1.56 + ? = 100
  2. 2.45 + ? = 100
  3. 3.23 + ? = 100
  4. 4.7 + ? = 10
  5. 5.5 + ? = 10
  6. 6.8 + ? = 10
  7. 7.89 + ? = 100
  8. 8.19 + ? = 100
  9. 9.18 + ? = 100
  10. 10.66 + ? = 100
  11. 11.31 + ? = 100
  12. 12.43 + ? = 100
  13. 13.20 + ? = 100
  14. 14.54 + ? = 100
  15. 15.1 + ? = 10
  16. 16.85 + ? = 100
  17. 17.2 + ? = 10
  18. 18.9 + ? = 10
  19. 19.72 + ? = 100
  20. 20.26 + ? = 100
  21. 21.70 + ? = 100
  22. 22.55 + ? = 100
  23. 23.71 + ? = 100
  24. 24.47 + ? = 100
  25. 25.3 + ? = 10
  26. 26.81 + ? = 100
  27. 27.15 + ? = 100
  28. 28.28 + ? = 100
  29. 29.37 + ? = 100
  30. 30.51 + ? = 100
  31. 31.69 + ? = 100
  32. 32.84 + ? = 100
  33. 33.59 + ? = 100
  34. 34.44 + ? = 100
  35. 35.17 + ? = 100
  36. 36.46 + ? = 100
  37. 37.4 + ? = 10
  38. 38.86 + ? = 100
  39. 39.6 + ? = 10
  40. 40.64 + ? = 100

Answer key

  1. 44
  2. 55
  3. 77
  4. 3
  5. 5
  6. 2
  7. 11
  8. 81
  9. 82
  10. 34
  11. 69
  12. 57
  13. 80
  14. 46
  15. 9
  16. 15
  17. 8
  18. 1
  19. 28
  20. 74
  21. 30
  22. 45
  23. 29
  24. 53
  25. 7
  26. 19
  27. 85
  28. 72
  29. 63
  30. 49
  31. 31
  32. 16
  33. 41
  34. 56
  35. 83
  36. 54
  37. 6
  38. 14
  39. 4
  40. 36

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