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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 792 · 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. 1.4 + ? = 10
  2. 2.9 + ? = 10
  3. 3.40 + ? = 100
  4. 4.19 + ? = 100
  5. 5.7 + ? = 10
  6. 6.1 + ? = 10
  7. 7.50 + ? = 100
  8. 8.54 + ? = 100
  9. 9.3 + ? = 10
  10. 10.2 + ? = 10
  11. 11.28 + ? = 100
  12. 12.71 + ? = 100
  13. 13.88 + ? = 100
  14. 14.17 + ? = 100
  15. 15.18 + ? = 100
  16. 16.65 + ? = 100
  17. 17.5 + ? = 10
  18. 18.20 + ? = 100
  19. 19.8 + ? = 10
  20. 20.22 + ? = 100
  21. 21.51 + ? = 100
  22. 22.64 + ? = 100
  23. 23.80 + ? = 100
  24. 24.77 + ? = 100
  25. 25.25 + ? = 100
  26. 26.34 + ? = 100
  27. 27.74 + ? = 100
  28. 28.73 + ? = 100
  29. 29.33 + ? = 100
  30. 30.62 + ? = 100
  31. 31.39 + ? = 100
  32. 32.35 + ? = 100
  33. 33.42 + ? = 100
  34. 34.56 + ? = 100
  35. 35.81 + ? = 100
  36. 36.6 + ? = 10
  37. 37.15 + ? = 100
  38. 38.69 + ? = 100
  39. 39.57 + ? = 100
  40. 40.23 + ? = 100

Answer key

  1. 6
  2. 1
  3. 60
  4. 81
  5. 3
  6. 9
  7. 50
  8. 46
  9. 7
  10. 8
  11. 72
  12. 29
  13. 12
  14. 83
  15. 82
  16. 35
  17. 5
  18. 80
  19. 2
  20. 78
  21. 49
  22. 36
  23. 20
  24. 23
  25. 75
  26. 66
  27. 26
  28. 27
  29. 67
  30. 38
  31. 61
  32. 65
  33. 58
  34. 44
  35. 19
  36. 4
  37. 85
  38. 31
  39. 43
  40. 77

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