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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 930 · 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. 1.11 + ? = 100
  2. 2.43 + ? = 100
  3. 3.12 + ? = 100
  4. 4.4 + ? = 10
  5. 5.3 + ? = 10
  6. 6.7 + ? = 10
  7. 7.71 + ? = 100
  8. 8.74 + ? = 100
  9. 9.85 + ? = 100
  10. 10.24 + ? = 100
  11. 11.1 + ? = 10
  12. 12.8 + ? = 10
  13. 13.67 + ? = 100
  14. 14.49 + ? = 100
  15. 15.59 + ? = 100
  16. 16.84 + ? = 100
  17. 17.64 + ? = 100
  18. 18.6 + ? = 10
  19. 19.5 + ? = 10
  20. 20.9 + ? = 10
  21. 21.35 + ? = 100
  22. 22.89 + ? = 100
  23. 23.14 + ? = 100
  24. 24.54 + ? = 100
  25. 25.27 + ? = 100
  26. 26.15 + ? = 100
  27. 27.28 + ? = 100
  28. 28.2 + ? = 10
  29. 29.83 + ? = 100
  30. 30.18 + ? = 100
  31. 31.47 + ? = 100
  32. 32.65 + ? = 100
  33. 33.55 + ? = 100
  34. 34.76 + ? = 100
  35. 35.50 + ? = 100
  36. 36.30 + ? = 100
  37. 37.69 + ? = 100
  38. 38.33 + ? = 100
  39. 39.34 + ? = 100
  40. 40.20 + ? = 100

Answer key

  1. 89
  2. 57
  3. 88
  4. 6
  5. 7
  6. 3
  7. 29
  8. 26
  9. 15
  10. 76
  11. 9
  12. 2
  13. 33
  14. 51
  15. 41
  16. 16
  17. 36
  18. 4
  19. 5
  20. 1
  21. 65
  22. 11
  23. 86
  24. 46
  25. 73
  26. 85
  27. 72
  28. 8
  29. 17
  30. 82
  31. 53
  32. 35
  33. 45
  34. 24
  35. 50
  36. 70
  37. 31
  38. 67
  39. 66
  40. 80

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