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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 727 · 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. 1.1 + ? = 10
  2. 2.6 + ? = 10
  3. 3.3 + ? = 10
  4. 4.86 + ? = 100
  5. 5.5 + ? = 10
  6. 6.82 + ? = 100
  7. 7.9 + ? = 10
  8. 8.2 + ? = 10
  9. 9.4 + ? = 10
  10. 10.64 + ? = 100
  11. 11.27 + ? = 100
  12. 12.8 + ? = 10
  13. 13.48 + ? = 100
  14. 14.38 + ? = 100
  15. 15.25 + ? = 100
  16. 16.7 + ? = 10
  17. 17.52 + ? = 100
  18. 18.87 + ? = 100
  19. 19.32 + ? = 100
  20. 20.62 + ? = 100
  21. 21.19 + ? = 100
  22. 22.54 + ? = 100
  23. 23.28 + ? = 100
  24. 24.20 + ? = 100
  25. 25.84 + ? = 100
  26. 26.40 + ? = 100
  27. 27.14 + ? = 100
  28. 28.16 + ? = 100
  29. 29.60 + ? = 100
  30. 30.55 + ? = 100
  31. 31.31 + ? = 100
  32. 32.76 + ? = 100
  33. 33.22 + ? = 100
  34. 34.18 + ? = 100
  35. 35.59 + ? = 100
  36. 36.78 + ? = 100
  37. 37.68 + ? = 100
  38. 38.33 + ? = 100
  39. 39.36 + ? = 100
  40. 40.45 + ? = 100

Answer key

  1. 9
  2. 4
  3. 7
  4. 14
  5. 5
  6. 18
  7. 1
  8. 8
  9. 6
  10. 36
  11. 73
  12. 2
  13. 52
  14. 62
  15. 75
  16. 3
  17. 48
  18. 13
  19. 68
  20. 38
  21. 81
  22. 46
  23. 72
  24. 80
  25. 16
  26. 60
  27. 86
  28. 84
  29. 40
  30. 45
  31. 69
  32. 24
  33. 78
  34. 82
  35. 41
  36. 22
  37. 32
  38. 67
  39. 64
  40. 55

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