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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 974 · 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. 2.42 + ? = 100
  3. 3.4 + ? = 10
  4. 4.5 + ? = 10
  5. 5.1 + ? = 10
  6. 6.40 + ? = 100
  7. 7.82 + ? = 100
  8. 8.7 + ? = 10
  9. 9.86 + ? = 100
  10. 10.70 + ? = 100
  11. 11.2 + ? = 10
  12. 12.24 + ? = 100
  13. 13.23 + ? = 100
  14. 14.55 + ? = 100
  15. 15.79 + ? = 100
  16. 16.6 + ? = 10
  17. 17.3 + ? = 10
  18. 18.69 + ? = 100
  19. 19.14 + ? = 100
  20. 20.21 + ? = 100
  21. 21.18 + ? = 100
  22. 22.9 + ? = 10
  23. 23.35 + ? = 100
  24. 24.89 + ? = 100
  25. 25.34 + ? = 100
  26. 26.8 + ? = 10
  27. 27.60 + ? = 100
  28. 28.64 + ? = 100
  29. 29.72 + ? = 100
  30. 30.44 + ? = 100
  31. 31.80 + ? = 100
  32. 32.66 + ? = 100
  33. 33.56 + ? = 100
  34. 34.25 + ? = 100
  35. 35.81 + ? = 100
  36. 36.39 + ? = 100
  37. 37.45 + ? = 100
  38. 38.73 + ? = 100
  39. 39.51 + ? = 100
  40. 40.77 + ? = 100

Answer key

  1. 33
  2. 58
  3. 6
  4. 5
  5. 9
  6. 60
  7. 18
  8. 3
  9. 14
  10. 30
  11. 8
  12. 76
  13. 77
  14. 45
  15. 21
  16. 4
  17. 7
  18. 31
  19. 86
  20. 79
  21. 82
  22. 1
  23. 65
  24. 11
  25. 66
  26. 2
  27. 40
  28. 36
  29. 28
  30. 56
  31. 20
  32. 34
  33. 44
  34. 75
  35. 19
  36. 61
  37. 55
  38. 27
  39. 49
  40. 23

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