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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 733 · 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. 1.36 + ? = 100
  2. 2.21 + ? = 100
  3. 3.66 + ? = 100
  4. 4.17 + ? = 100
  5. 5.35 + ? = 100
  6. 6.50 + ? = 100
  7. 7.18 + ? = 100
  8. 8.75 + ? = 100
  9. 9.6 + ? = 10
  10. 10.15 + ? = 100
  11. 11.2 + ? = 10
  12. 12.56 + ? = 100
  13. 13.5 + ? = 10
  14. 14.8 + ? = 10
  15. 15.9 + ? = 10
  16. 16.44 + ? = 100
  17. 17.32 + ? = 100
  18. 18.33 + ? = 100
  19. 19.84 + ? = 100
  20. 20.30 + ? = 100
  21. 21.62 + ? = 100
  22. 22.65 + ? = 100
  23. 23.24 + ? = 100
  24. 24.4 + ? = 10
  25. 25.3 + ? = 10
  26. 26.55 + ? = 100
  27. 27.29 + ? = 100
  28. 28.25 + ? = 100
  29. 29.7 + ? = 10
  30. 30.49 + ? = 100
  31. 31.87 + ? = 100
  32. 32.48 + ? = 100
  33. 33.27 + ? = 100
  34. 34.1 + ? = 10
  35. 35.52 + ? = 100
  36. 36.14 + ? = 100
  37. 37.42 + ? = 100
  38. 38.37 + ? = 100
  39. 39.31 + ? = 100
  40. 40.83 + ? = 100

Answer key

  1. 64
  2. 79
  3. 34
  4. 83
  5. 65
  6. 50
  7. 82
  8. 25
  9. 4
  10. 85
  11. 8
  12. 44
  13. 5
  14. 2
  15. 1
  16. 56
  17. 68
  18. 67
  19. 16
  20. 70
  21. 38
  22. 35
  23. 76
  24. 6
  25. 7
  26. 45
  27. 71
  28. 75
  29. 3
  30. 51
  31. 13
  32. 52
  33. 73
  34. 9
  35. 48
  36. 86
  37. 58
  38. 63
  39. 69
  40. 17

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