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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 773 · 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. 1.12 + ? = 100
  2. 2.49 + ? = 100
  3. 3.75 + ? = 100
  4. 4.27 + ? = 100
  5. 5.4 + ? = 10
  6. 6.31 + ? = 100
  7. 7.52 + ? = 100
  8. 8.24 + ? = 100
  9. 9.34 + ? = 100
  10. 10.88 + ? = 100
  11. 11.50 + ? = 100
  12. 12.38 + ? = 100
  13. 13.72 + ? = 100
  14. 14.9 + ? = 10
  15. 15.2 + ? = 10
  16. 16.43 + ? = 100
  17. 17.79 + ? = 100
  18. 18.14 + ? = 100
  19. 19.6 + ? = 10
  20. 20.64 + ? = 100
  21. 21.11 + ? = 100
  22. 22.84 + ? = 100
  23. 23.45 + ? = 100
  24. 24.8 + ? = 10
  25. 25.83 + ? = 100
  26. 26.18 + ? = 100
  27. 27.3 + ? = 10
  28. 28.5 + ? = 10
  29. 29.58 + ? = 100
  30. 30.71 + ? = 100
  31. 31.41 + ? = 100
  32. 32.16 + ? = 100
  33. 33.22 + ? = 100
  34. 34.54 + ? = 100
  35. 35.53 + ? = 100
  36. 36.81 + ? = 100
  37. 37.21 + ? = 100
  38. 38.87 + ? = 100
  39. 39.39 + ? = 100
  40. 40.25 + ? = 100

Answer key

  1. 88
  2. 51
  3. 25
  4. 73
  5. 6
  6. 69
  7. 48
  8. 76
  9. 66
  10. 12
  11. 50
  12. 62
  13. 28
  14. 1
  15. 8
  16. 57
  17. 21
  18. 86
  19. 4
  20. 36
  21. 89
  22. 16
  23. 55
  24. 2
  25. 17
  26. 82
  27. 7
  28. 5
  29. 42
  30. 29
  31. 59
  32. 84
  33. 78
  34. 46
  35. 47
  36. 19
  37. 79
  38. 13
  39. 61
  40. 75

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