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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 872 · 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. 1.3 + ? = 10
  2. 2.13 + ? = 100
  3. 3.1 + ? = 10
  4. 4.5 + ? = 10
  5. 5.34 + ? = 100
  6. 6.6 + ? = 10
  7. 7.68 + ? = 100
  8. 8.12 + ? = 100
  9. 9.20 + ? = 100
  10. 10.54 + ? = 100
  11. 11.24 + ? = 100
  12. 12.30 + ? = 100
  13. 13.77 + ? = 100
  14. 14.57 + ? = 100
  15. 15.44 + ? = 100
  16. 16.2 + ? = 10
  17. 17.27 + ? = 100
  18. 18.9 + ? = 10
  19. 19.42 + ? = 100
  20. 20.65 + ? = 100
  21. 21.28 + ? = 100
  22. 22.21 + ? = 100
  23. 23.75 + ? = 100
  24. 24.56 + ? = 100
  25. 25.15 + ? = 100
  26. 26.40 + ? = 100
  27. 27.86 + ? = 100
  28. 28.81 + ? = 100
  29. 29.49 + ? = 100
  30. 30.23 + ? = 100
  31. 31.89 + ? = 100
  32. 32.67 + ? = 100
  33. 33.26 + ? = 100
  34. 34.19 + ? = 100
  35. 35.41 + ? = 100
  36. 36.43 + ? = 100
  37. 37.32 + ? = 100
  38. 38.45 + ? = 100
  39. 39.64 + ? = 100
  40. 40.18 + ? = 100

Answer key

  1. 7
  2. 87
  3. 9
  4. 5
  5. 66
  6. 4
  7. 32
  8. 88
  9. 80
  10. 46
  11. 76
  12. 70
  13. 23
  14. 43
  15. 56
  16. 8
  17. 73
  18. 1
  19. 58
  20. 35
  21. 72
  22. 79
  23. 25
  24. 44
  25. 85
  26. 60
  27. 14
  28. 19
  29. 51
  30. 77
  31. 11
  32. 33
  33. 74
  34. 81
  35. 59
  36. 57
  37. 68
  38. 55
  39. 36
  40. 82

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