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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 874 · 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. 1.60 + ? = 100
  2. 2.8 + ? = 10
  3. 3.3 + ? = 10
  4. 4.25 + ? = 100
  5. 5.61 + ? = 100
  6. 6.2 + ? = 10
  7. 7.51 + ? = 100
  8. 8.75 + ? = 100
  9. 9.43 + ? = 100
  10. 10.4 + ? = 10
  11. 11.9 + ? = 10
  12. 12.79 + ? = 100
  13. 13.35 + ? = 100
  14. 14.71 + ? = 100
  15. 15.1 + ? = 10
  16. 16.57 + ? = 100
  17. 17.64 + ? = 100
  18. 18.39 + ? = 100
  19. 19.17 + ? = 100
  20. 20.55 + ? = 100
  21. 21.20 + ? = 100
  22. 22.69 + ? = 100
  23. 23.7 + ? = 10
  24. 24.23 + ? = 100
  25. 25.88 + ? = 100
  26. 26.48 + ? = 100
  27. 27.6 + ? = 10
  28. 28.66 + ? = 100
  29. 29.5 + ? = 10
  30. 30.52 + ? = 100
  31. 31.12 + ? = 100
  32. 32.53 + ? = 100
  33. 33.22 + ? = 100
  34. 34.50 + ? = 100
  35. 35.15 + ? = 100
  36. 36.77 + ? = 100
  37. 37.31 + ? = 100
  38. 38.18 + ? = 100
  39. 39.33 + ? = 100
  40. 40.59 + ? = 100

Answer key

  1. 40
  2. 2
  3. 7
  4. 75
  5. 39
  6. 8
  7. 49
  8. 25
  9. 57
  10. 6
  11. 1
  12. 21
  13. 65
  14. 29
  15. 9
  16. 43
  17. 36
  18. 61
  19. 83
  20. 45
  21. 80
  22. 31
  23. 3
  24. 77
  25. 12
  26. 52
  27. 4
  28. 34
  29. 5
  30. 48
  31. 88
  32. 47
  33. 78
  34. 50
  35. 85
  36. 23
  37. 69
  38. 82
  39. 67
  40. 41

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