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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 946 · 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. 1.75 + ? = 100
  2. 2.37 + ? = 100
  3. 3.33 + ? = 100
  4. 4.3 + ? = 10
  5. 5.24 + ? = 100
  6. 6.8 + ? = 10
  7. 7.44 + ? = 100
  8. 8.2 + ? = 10
  9. 9.1 + ? = 10
  10. 10.29 + ? = 100
  11. 11.5 + ? = 10
  12. 12.39 + ? = 100
  13. 13.61 + ? = 100
  14. 14.11 + ? = 100
  15. 15.4 + ? = 10
  16. 16.79 + ? = 100
  17. 17.68 + ? = 100
  18. 18.77 + ? = 100
  19. 19.6 + ? = 10
  20. 20.47 + ? = 100
  21. 21.7 + ? = 10
  22. 22.73 + ? = 100
  23. 23.85 + ? = 100
  24. 24.49 + ? = 100
  25. 25.42 + ? = 100
  26. 26.83 + ? = 100
  27. 27.27 + ? = 100
  28. 28.28 + ? = 100
  29. 29.9 + ? = 10
  30. 30.34 + ? = 100
  31. 31.41 + ? = 100
  32. 32.20 + ? = 100
  33. 33.22 + ? = 100
  34. 34.43 + ? = 100
  35. 35.26 + ? = 100
  36. 36.21 + ? = 100
  37. 37.16 + ? = 100
  38. 38.25 + ? = 100
  39. 39.13 + ? = 100
  40. 40.57 + ? = 100

Answer key

  1. 25
  2. 63
  3. 67
  4. 7
  5. 76
  6. 2
  7. 56
  8. 8
  9. 9
  10. 71
  11. 5
  12. 61
  13. 39
  14. 89
  15. 6
  16. 21
  17. 32
  18. 23
  19. 4
  20. 53
  21. 3
  22. 27
  23. 15
  24. 51
  25. 58
  26. 17
  27. 73
  28. 72
  29. 1
  30. 66
  31. 59
  32. 80
  33. 78
  34. 57
  35. 74
  36. 79
  37. 84
  38. 75
  39. 87
  40. 43

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