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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 960 · 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. 1.67 + ? = 100
  2. 2.39 + ? = 100
  3. 3.8 + ? = 10
  4. 4.5 + ? = 10
  5. 5.7 + ? = 10
  6. 6.6 + ? = 10
  7. 7.38 + ? = 100
  8. 8.40 + ? = 100
  9. 9.26 + ? = 100
  10. 10.9 + ? = 10
  11. 11.23 + ? = 100
  12. 12.51 + ? = 100
  13. 13.18 + ? = 100
  14. 14.14 + ? = 100
  15. 15.4 + ? = 10
  16. 16.2 + ? = 10
  17. 17.72 + ? = 100
  18. 18.44 + ? = 100
  19. 19.82 + ? = 100
  20. 20.48 + ? = 100
  21. 21.1 + ? = 10
  22. 22.12 + ? = 100
  23. 23.31 + ? = 100
  24. 24.20 + ? = 100
  25. 25.17 + ? = 100
  26. 26.33 + ? = 100
  27. 27.42 + ? = 100
  28. 28.57 + ? = 100
  29. 29.56 + ? = 100
  30. 30.36 + ? = 100
  31. 31.37 + ? = 100
  32. 32.3 + ? = 10
  33. 33.69 + ? = 100
  34. 34.89 + ? = 100
  35. 35.81 + ? = 100
  36. 36.45 + ? = 100
  37. 37.85 + ? = 100
  38. 38.70 + ? = 100
  39. 39.16 + ? = 100
  40. 40.59 + ? = 100

Answer key

  1. 33
  2. 61
  3. 2
  4. 5
  5. 3
  6. 4
  7. 62
  8. 60
  9. 74
  10. 1
  11. 77
  12. 49
  13. 82
  14. 86
  15. 6
  16. 8
  17. 28
  18. 56
  19. 18
  20. 52
  21. 9
  22. 88
  23. 69
  24. 80
  25. 83
  26. 67
  27. 58
  28. 43
  29. 44
  30. 64
  31. 63
  32. 7
  33. 31
  34. 11
  35. 19
  36. 55
  37. 15
  38. 30
  39. 84
  40. 41

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