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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 871 · 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. 1.9 + ? = 10
  2. 2.37 + ? = 100
  3. 3.29 + ? = 100
  4. 4.45 + ? = 100
  5. 5.5 + ? = 10
  6. 6.31 + ? = 100
  7. 7.72 + ? = 100
  8. 8.4 + ? = 10
  9. 9.62 + ? = 100
  10. 10.85 + ? = 100
  11. 11.6 + ? = 10
  12. 12.36 + ? = 100
  13. 13.25 + ? = 100
  14. 14.67 + ? = 100
  15. 15.38 + ? = 100
  16. 16.19 + ? = 100
  17. 17.86 + ? = 100
  18. 18.1 + ? = 10
  19. 19.7 + ? = 10
  20. 20.27 + ? = 100
  21. 21.20 + ? = 100
  22. 22.61 + ? = 100
  23. 23.18 + ? = 100
  24. 24.11 + ? = 100
  25. 25.50 + ? = 100
  26. 26.41 + ? = 100
  27. 27.79 + ? = 100
  28. 28.81 + ? = 100
  29. 29.63 + ? = 100
  30. 30.15 + ? = 100
  31. 31.47 + ? = 100
  32. 32.8 + ? = 10
  33. 33.26 + ? = 100
  34. 34.53 + ? = 100
  35. 35.2 + ? = 10
  36. 36.30 + ? = 100
  37. 37.83 + ? = 100
  38. 38.3 + ? = 10
  39. 39.39 + ? = 100
  40. 40.74 + ? = 100

Answer key

  1. 1
  2. 63
  3. 71
  4. 55
  5. 5
  6. 69
  7. 28
  8. 6
  9. 38
  10. 15
  11. 4
  12. 64
  13. 75
  14. 33
  15. 62
  16. 81
  17. 14
  18. 9
  19. 3
  20. 73
  21. 80
  22. 39
  23. 82
  24. 89
  25. 50
  26. 59
  27. 21
  28. 19
  29. 37
  30. 85
  31. 53
  32. 2
  33. 74
  34. 47
  35. 8
  36. 70
  37. 17
  38. 7
  39. 61
  40. 26

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