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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 865 · 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. 1.72 + ? = 100
  2. 2.9 + ? = 10
  3. 3.1 + ? = 10
  4. 4.24 + ? = 100
  5. 5.30 + ? = 100
  6. 6.31 + ? = 100
  7. 7.42 + ? = 100
  8. 8.75 + ? = 100
  9. 9.37 + ? = 100
  10. 10.23 + ? = 100
  11. 11.8 + ? = 10
  12. 12.26 + ? = 100
  13. 13.69 + ? = 100
  14. 14.4 + ? = 10
  15. 15.80 + ? = 100
  16. 16.29 + ? = 100
  17. 17.3 + ? = 10
  18. 18.41 + ? = 100
  19. 19.2 + ? = 10
  20. 20.25 + ? = 100
  21. 21.49 + ? = 100
  22. 22.32 + ? = 100
  23. 23.6 + ? = 10
  24. 24.86 + ? = 100
  25. 25.62 + ? = 100
  26. 26.7 + ? = 10
  27. 27.77 + ? = 100
  28. 28.57 + ? = 100
  29. 29.34 + ? = 100
  30. 30.74 + ? = 100
  31. 31.61 + ? = 100
  32. 32.13 + ? = 100
  33. 33.20 + ? = 100
  34. 34.66 + ? = 100
  35. 35.5 + ? = 10
  36. 36.48 + ? = 100
  37. 37.56 + ? = 100
  38. 38.79 + ? = 100
  39. 39.45 + ? = 100
  40. 40.78 + ? = 100

Answer key

  1. 28
  2. 1
  3. 9
  4. 76
  5. 70
  6. 69
  7. 58
  8. 25
  9. 63
  10. 77
  11. 2
  12. 74
  13. 31
  14. 6
  15. 20
  16. 71
  17. 7
  18. 59
  19. 8
  20. 75
  21. 51
  22. 68
  23. 4
  24. 14
  25. 38
  26. 3
  27. 23
  28. 43
  29. 66
  30. 26
  31. 39
  32. 87
  33. 80
  34. 34
  35. 5
  36. 52
  37. 44
  38. 21
  39. 55
  40. 22

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