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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 980 · 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. 1.2 + ? = 10
  2. 2.4 + ? = 10
  3. 3.49 + ? = 100
  4. 4.47 + ? = 100
  5. 5.9 + ? = 10
  6. 6.86 + ? = 100
  7. 7.6 + ? = 10
  8. 8.5 + ? = 10
  9. 9.7 + ? = 10
  10. 10.3 + ? = 10
  11. 11.64 + ? = 100
  12. 12.22 + ? = 100
  13. 13.29 + ? = 100
  14. 14.80 + ? = 100
  15. 15.12 + ? = 100
  16. 16.8 + ? = 10
  17. 17.57 + ? = 100
  18. 18.50 + ? = 100
  19. 19.1 + ? = 10
  20. 20.19 + ? = 100
  21. 21.81 + ? = 100
  22. 22.17 + ? = 100
  23. 23.40 + ? = 100
  24. 24.82 + ? = 100
  25. 25.28 + ? = 100
  26. 26.59 + ? = 100
  27. 27.85 + ? = 100
  28. 28.61 + ? = 100
  29. 29.63 + ? = 100
  30. 30.25 + ? = 100
  31. 31.77 + ? = 100
  32. 32.36 + ? = 100
  33. 33.16 + ? = 100
  34. 34.68 + ? = 100
  35. 35.54 + ? = 100
  36. 36.26 + ? = 100
  37. 37.72 + ? = 100
  38. 38.89 + ? = 100
  39. 39.41 + ? = 100
  40. 40.56 + ? = 100

Answer key

  1. 8
  2. 6
  3. 51
  4. 53
  5. 1
  6. 14
  7. 4
  8. 5
  9. 3
  10. 7
  11. 36
  12. 78
  13. 71
  14. 20
  15. 88
  16. 2
  17. 43
  18. 50
  19. 9
  20. 81
  21. 19
  22. 83
  23. 60
  24. 18
  25. 72
  26. 41
  27. 15
  28. 39
  29. 37
  30. 75
  31. 23
  32. 64
  33. 84
  34. 32
  35. 46
  36. 74
  37. 28
  38. 11
  39. 59
  40. 44

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