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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 829 · 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. 1.48 + ? = 100
  2. 2.4 + ? = 10
  3. 3.6 + ? = 10
  4. 4.1 + ? = 10
  5. 5.50 + ? = 100
  6. 6.58 + ? = 100
  7. 7.2 + ? = 10
  8. 8.7 + ? = 10
  9. 9.26 + ? = 100
  10. 10.12 + ? = 100
  11. 11.20 + ? = 100
  12. 12.5 + ? = 10
  13. 13.43 + ? = 100
  14. 14.27 + ? = 100
  15. 15.30 + ? = 100
  16. 16.71 + ? = 100
  17. 17.82 + ? = 100
  18. 18.3 + ? = 10
  19. 19.67 + ? = 100
  20. 20.8 + ? = 10
  21. 21.41 + ? = 100
  22. 22.14 + ? = 100
  23. 23.9 + ? = 10
  24. 24.23 + ? = 100
  25. 25.29 + ? = 100
  26. 26.17 + ? = 100
  27. 27.59 + ? = 100
  28. 28.78 + ? = 100
  29. 29.69 + ? = 100
  30. 30.87 + ? = 100
  31. 31.42 + ? = 100
  32. 32.39 + ? = 100
  33. 33.68 + ? = 100
  34. 34.31 + ? = 100
  35. 35.85 + ? = 100
  36. 36.73 + ? = 100
  37. 37.24 + ? = 100
  38. 38.7 + ? = 10
  39. 39.45 + ? = 100
  40. 40.35 + ? = 100

Answer key

  1. 52
  2. 6
  3. 4
  4. 9
  5. 50
  6. 42
  7. 8
  8. 3
  9. 74
  10. 88
  11. 80
  12. 5
  13. 57
  14. 73
  15. 70
  16. 29
  17. 18
  18. 7
  19. 33
  20. 2
  21. 59
  22. 86
  23. 1
  24. 77
  25. 71
  26. 83
  27. 41
  28. 22
  29. 31
  30. 13
  31. 58
  32. 61
  33. 32
  34. 69
  35. 15
  36. 27
  37. 76
  38. 3
  39. 55
  40. 65

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