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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 637 · 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 54 =
  2. 2.Half of 168 =
  3. 3.Double 68 =
  4. 4.Half of 28 =
  5. 5.Half of 88 =
  6. 6.Double 64 =
  7. 7.Double 28 =
  8. 8.Half of 62 =
  9. 9.Double 86 =
  10. 10.Double 61 =
  11. 11.Half of 154 =
  12. 12.Half of 188 =
  13. 13.Double 44 =
  14. 14.Half of 64 =
  15. 15.Double 22 =
  16. 16.Double 85 =
  17. 17.Half of 136 =
  18. 18.Double 62 =
  19. 19.Half of 172 =
  20. 20.Double 25 =
  21. 21.Half of 18 =
  22. 22.Double 88 =
  23. 23.Half of 114 =
  24. 24.Half of 174 =
  25. 25.Double 96 =
  26. 26.Double 73 =
  27. 27.Double 97 =
  28. 28.Double 16 =
  29. 29.Half of 128 =
  30. 30.Double 89 =
  31. 31.Half of 108 =
  32. 32.Half of 36 =
  33. 33.Half of 192 =
  34. 34.Double 91 =
  35. 35.Half of 46 =
  36. 36.Half of 32 =
  37. 37.Double 87 =
  38. 38.Double 49 =
  39. 39.Half of 26 =
  40. 40.Double 78 =

Answer key

  1. 108
  2. 84
  3. 136
  4. 14
  5. 44
  6. 128
  7. 56
  8. 31
  9. 172
  10. 122
  11. 77
  12. 94
  13. 88
  14. 32
  15. 44
  16. 170
  17. 68
  18. 124
  19. 86
  20. 50
  21. 9
  22. 176
  23. 57
  24. 87
  25. 192
  26. 146
  27. 194
  28. 32
  29. 64
  30. 178
  31. 54
  32. 18
  33. 96
  34. 182
  35. 23
  36. 16
  37. 174
  38. 98
  39. 13
  40. 156

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