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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 977 · 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. 1.61 + ? = 100
  2. 2.2 + ? = 10
  3. 3.7 + ? = 10
  4. 4.80 + ? = 100
  5. 5.6 + ? = 10
  6. 6.66 + ? = 100
  7. 7.42 + ? = 100
  8. 8.5 + ? = 10
  9. 9.82 + ? = 100
  10. 10.22 + ? = 100
  11. 11.49 + ? = 100
  12. 12.84 + ? = 100
  13. 13.25 + ? = 100
  14. 14.83 + ? = 100
  15. 15.8 + ? = 10
  16. 16.4 + ? = 10
  17. 17.13 + ? = 100
  18. 18.78 + ? = 100
  19. 19.60 + ? = 100
  20. 20.58 + ? = 100
  21. 21.33 + ? = 100
  22. 22.29 + ? = 100
  23. 23.3 + ? = 10
  24. 24.20 + ? = 100
  25. 25.24 + ? = 100
  26. 26.56 + ? = 100
  27. 27.31 + ? = 100
  28. 28.23 + ? = 100
  29. 29.9 + ? = 10
  30. 30.69 + ? = 100
  31. 31.36 + ? = 100
  32. 32.1 + ? = 10
  33. 33.68 + ? = 100
  34. 34.72 + ? = 100
  35. 35.21 + ? = 100
  36. 36.48 + ? = 100
  37. 37.35 + ? = 100
  38. 38.41 + ? = 100
  39. 39.65 + ? = 100
  40. 40.44 + ? = 100

Answer key

  1. 39
  2. 8
  3. 3
  4. 20
  5. 4
  6. 34
  7. 58
  8. 5
  9. 18
  10. 78
  11. 51
  12. 16
  13. 75
  14. 17
  15. 2
  16. 6
  17. 87
  18. 22
  19. 40
  20. 42
  21. 67
  22. 71
  23. 7
  24. 80
  25. 76
  26. 44
  27. 69
  28. 77
  29. 1
  30. 31
  31. 64
  32. 9
  33. 32
  34. 28
  35. 79
  36. 52
  37. 65
  38. 59
  39. 35
  40. 56

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