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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 765 · 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. 1.6 + ? = 10
  2. 2.73 + ? = 100
  3. 3.8 + ? = 10
  4. 4.5 + ? = 10
  5. 5.37 + ? = 100
  6. 6.78 + ? = 100
  7. 7.9 + ? = 10
  8. 8.44 + ? = 100
  9. 9.38 + ? = 100
  10. 10.2 + ? = 10
  11. 11.72 + ? = 100
  12. 12.28 + ? = 100
  13. 13.4 + ? = 10
  14. 14.7 + ? = 10
  15. 15.24 + ? = 100
  16. 16.21 + ? = 100
  17. 17.26 + ? = 100
  18. 18.60 + ? = 100
  19. 19.1 + ? = 10
  20. 20.82 + ? = 100
  21. 21.14 + ? = 100
  22. 22.63 + ? = 100
  23. 23.11 + ? = 100
  24. 24.27 + ? = 100
  25. 25.36 + ? = 100
  26. 26.20 + ? = 100
  27. 27.66 + ? = 100
  28. 28.29 + ? = 100
  29. 29.84 + ? = 100
  30. 30.47 + ? = 100
  31. 31.32 + ? = 100
  32. 32.50 + ? = 100
  33. 33.35 + ? = 100
  34. 34.3 + ? = 10
  35. 35.40 + ? = 100
  36. 36.46 + ? = 100
  37. 37.22 + ? = 100
  38. 38.64 + ? = 100
  39. 39.17 + ? = 100
  40. 40.62 + ? = 100

Answer key

  1. 4
  2. 27
  3. 2
  4. 5
  5. 63
  6. 22
  7. 1
  8. 56
  9. 62
  10. 8
  11. 28
  12. 72
  13. 6
  14. 3
  15. 76
  16. 79
  17. 74
  18. 40
  19. 9
  20. 18
  21. 86
  22. 37
  23. 89
  24. 73
  25. 64
  26. 80
  27. 34
  28. 71
  29. 16
  30. 53
  31. 68
  32. 50
  33. 65
  34. 7
  35. 60
  36. 54
  37. 78
  38. 36
  39. 83
  40. 38

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