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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 911 · 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. 1.84 + ? = 100
  2. 2.25 + ? = 100
  3. 3.5 + ? = 10
  4. 4.33 + ? = 100
  5. 5.6 + ? = 10
  6. 6.75 + ? = 100
  7. 7.8 + ? = 10
  8. 8.1 + ? = 10
  9. 9.7 + ? = 10
  10. 10.54 + ? = 100
  11. 11.88 + ? = 100
  12. 12.66 + ? = 100
  13. 13.3 + ? = 10
  14. 14.13 + ? = 100
  15. 15.4 + ? = 10
  16. 16.59 + ? = 100
  17. 17.55 + ? = 100
  18. 18.21 + ? = 100
  19. 19.56 + ? = 100
  20. 20.14 + ? = 100
  21. 21.60 + ? = 100
  22. 22.48 + ? = 100
  23. 23.11 + ? = 100
  24. 24.47 + ? = 100
  25. 25.46 + ? = 100
  26. 26.37 + ? = 100
  27. 27.70 + ? = 100
  28. 28.2 + ? = 10
  29. 29.41 + ? = 100
  30. 30.61 + ? = 100
  31. 31.62 + ? = 100
  32. 32.76 + ? = 100
  33. 33.9 + ? = 10
  34. 34.77 + ? = 100
  35. 35.31 + ? = 100
  36. 36.15 + ? = 100
  37. 37.53 + ? = 100
  38. 38.89 + ? = 100
  39. 39.65 + ? = 100
  40. 40.73 + ? = 100

Answer key

  1. 16
  2. 75
  3. 5
  4. 67
  5. 4
  6. 25
  7. 2
  8. 9
  9. 3
  10. 46
  11. 12
  12. 34
  13. 7
  14. 87
  15. 6
  16. 41
  17. 45
  18. 79
  19. 44
  20. 86
  21. 40
  22. 52
  23. 89
  24. 53
  25. 54
  26. 63
  27. 30
  28. 8
  29. 59
  30. 39
  31. 38
  32. 24
  33. 1
  34. 23
  35. 69
  36. 85
  37. 47
  38. 11
  39. 35
  40. 27

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