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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 913 · 40 questions
TalentJR

The trick (Split and double): Split the number into tens and ones: 37 = 30 + 7. Double each part (30 → 60, 7 → 14) — or halve each part. Add the two answers: 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.Double 51 =
  2. 2.Double 76 =
  3. 3.Half of 142 =
  4. 4.Half of 146 =
  5. 5.Double 92 =
  6. 6.Half of 26 =
  7. 7.Double 25 =
  8. 8.Half of 102 =
  9. 9.Double 61 =
  10. 10.Half of 122 =
  11. 11.Half of 72 =
  12. 12.Double 57 =
  13. 13.Double 88 =
  14. 14.Half of 152 =
  15. 15.Double 34 =
  16. 16.Double 54 =
  17. 17.Double 83 =
  18. 18.Half of 186 =
  19. 19.Double 31 =
  20. 20.Double 89 =
  21. 21.Double 32 =
  22. 22.Half of 128 =
  23. 23.Half of 38 =
  24. 24.Double 39 =
  25. 25.Half of 172 =
  26. 26.Double 73 =
  27. 27.Half of 116 =
  28. 28.Double 43 =
  29. 29.Half of 106 =
  30. 30.Double 13 =
  31. 31.Double 29 =
  32. 32.Double 81 =
  33. 33.Half of 54 =
  34. 34.Half of 16 =
  35. 35.Double 46 =
  36. 36.Double 27 =
  37. 37.Double 16 =
  38. 38.Double 96 =
  39. 39.Double 36 =
  40. 40.Double 71 =

Answer key

  1. 102
  2. 152
  3. 71
  4. 73
  5. 184
  6. 13
  7. 50
  8. 51
  9. 122
  10. 61
  11. 36
  12. 114
  13. 176
  14. 76
  15. 68
  16. 108
  17. 166
  18. 93
  19. 62
  20. 178
  21. 64
  22. 64
  23. 19
  24. 78
  25. 86
  26. 146
  27. 58
  28. 86
  29. 53
  30. 26
  31. 58
  32. 162
  33. 27
  34. 8
  35. 92
  36. 54
  37. 32
  38. 192
  39. 72
  40. 142

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