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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 755 · 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. 1.26 + ? = 100
  2. 2.48 + ? = 100
  3. 3.8 + ? = 10
  4. 4.38 + ? = 100
  5. 5.19 + ? = 100
  6. 6.7 + ? = 10
  7. 7.81 + ? = 100
  8. 8.6 + ? = 10
  9. 9.66 + ? = 100
  10. 10.9 + ? = 10
  11. 11.25 + ? = 100
  12. 12.30 + ? = 100
  13. 13.69 + ? = 100
  14. 14.88 + ? = 100
  15. 15.24 + ? = 100
  16. 16.5 + ? = 10
  17. 17.12 + ? = 100
  18. 18.56 + ? = 100
  19. 19.74 + ? = 100
  20. 20.36 + ? = 100
  21. 21.3 + ? = 10
  22. 22.4 + ? = 10
  23. 23.89 + ? = 100
  24. 24.51 + ? = 100
  25. 25.2 + ? = 10
  26. 26.73 + ? = 100
  27. 27.82 + ? = 100
  28. 28.1 + ? = 10
  29. 29.34 + ? = 100
  30. 30.29 + ? = 100
  31. 31.13 + ? = 100
  32. 32.77 + ? = 100
  33. 33.83 + ? = 100
  34. 34.40 + ? = 100
  35. 35.33 + ? = 100
  36. 36.16 + ? = 100
  37. 37.64 + ? = 100
  38. 38.50 + ? = 100
  39. 39.41 + ? = 100
  40. 40.67 + ? = 100

Answer key

  1. 74
  2. 52
  3. 2
  4. 62
  5. 81
  6. 3
  7. 19
  8. 4
  9. 34
  10. 1
  11. 75
  12. 70
  13. 31
  14. 12
  15. 76
  16. 5
  17. 88
  18. 44
  19. 26
  20. 64
  21. 7
  22. 6
  23. 11
  24. 49
  25. 8
  26. 27
  27. 18
  28. 9
  29. 66
  30. 71
  31. 87
  32. 23
  33. 17
  34. 60
  35. 67
  36. 84
  37. 36
  38. 50
  39. 59
  40. 33

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