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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 751 · 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. 1.34 + ? = 100
  2. 2.78 + ? = 100
  3. 3.57 + ? = 100
  4. 4.53 + ? = 100
  5. 5.56 + ? = 100
  6. 6.71 + ? = 100
  7. 7.67 + ? = 100
  8. 8.7 + ? = 10
  9. 9.2 + ? = 10
  10. 10.3 + ? = 10
  11. 11.1 + ? = 10
  12. 12.6 + ? = 10
  13. 13.36 + ? = 100
  14. 14.9 + ? = 10
  15. 15.68 + ? = 100
  16. 16.13 + ? = 100
  17. 17.22 + ? = 100
  18. 18.5 + ? = 10
  19. 19.31 + ? = 100
  20. 20.48 + ? = 100
  21. 21.8 + ? = 10
  22. 22.64 + ? = 100
  23. 23.54 + ? = 100
  24. 24.88 + ? = 100
  25. 25.12 + ? = 100
  26. 26.17 + ? = 100
  27. 27.75 + ? = 100
  28. 28.30 + ? = 100
  29. 29.58 + ? = 100
  30. 30.4 + ? = 10
  31. 31.83 + ? = 100
  32. 32.70 + ? = 100
  33. 33.21 + ? = 100
  34. 34.85 + ? = 100
  35. 35.19 + ? = 100
  36. 36.35 + ? = 100
  37. 37.50 + ? = 100
  38. 38.72 + ? = 100
  39. 39.82 + ? = 100
  40. 40.62 + ? = 100

Answer key

  1. 66
  2. 22
  3. 43
  4. 47
  5. 44
  6. 29
  7. 33
  8. 3
  9. 8
  10. 7
  11. 9
  12. 4
  13. 64
  14. 1
  15. 32
  16. 87
  17. 78
  18. 5
  19. 69
  20. 52
  21. 2
  22. 36
  23. 46
  24. 12
  25. 88
  26. 83
  27. 25
  28. 70
  29. 42
  30. 6
  31. 17
  32. 30
  33. 79
  34. 15
  35. 81
  36. 65
  37. 50
  38. 28
  39. 18
  40. 38

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