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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 764 · 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. 1.23 + ? = 100
  2. 2.55 + ? = 100
  3. 3.25 + ? = 100
  4. 4.16 + ? = 100
  5. 5.70 + ? = 100
  6. 6.8 + ? = 10
  7. 7.11 + ? = 100
  8. 8.36 + ? = 100
  9. 9.17 + ? = 100
  10. 10.1 + ? = 10
  11. 11.84 + ? = 100
  12. 12.13 + ? = 100
  13. 13.27 + ? = 100
  14. 14.5 + ? = 10
  15. 15.76 + ? = 100
  16. 16.83 + ? = 100
  17. 17.6 + ? = 10
  18. 18.52 + ? = 100
  19. 19.33 + ? = 100
  20. 20.9 + ? = 10
  21. 21.68 + ? = 100
  22. 22.41 + ? = 100
  23. 23.81 + ? = 100
  24. 24.4 + ? = 10
  25. 25.21 + ? = 100
  26. 26.3 + ? = 10
  27. 27.2 + ? = 10
  28. 28.88 + ? = 100
  29. 29.82 + ? = 100
  30. 30.7 + ? = 10
  31. 31.50 + ? = 100
  32. 32.66 + ? = 100
  33. 33.59 + ? = 100
  34. 34.31 + ? = 100
  35. 35.15 + ? = 100
  36. 36.56 + ? = 100
  37. 37.12 + ? = 100
  38. 38.58 + ? = 100
  39. 39.26 + ? = 100
  40. 40.34 + ? = 100

Answer key

  1. 77
  2. 45
  3. 75
  4. 84
  5. 30
  6. 2
  7. 89
  8. 64
  9. 83
  10. 9
  11. 16
  12. 87
  13. 73
  14. 5
  15. 24
  16. 17
  17. 4
  18. 48
  19. 67
  20. 1
  21. 32
  22. 59
  23. 19
  24. 6
  25. 79
  26. 7
  27. 8
  28. 12
  29. 18
  30. 3
  31. 50
  32. 34
  33. 41
  34. 69
  35. 85
  36. 44
  37. 88
  38. 42
  39. 74
  40. 66

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