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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 328 · 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.Half of 44 =
  2. 2.Double 11 =
  3. 3.Double 84 =
  4. 4.Double 86 =
  5. 5.Half of 136 =
  6. 6.Half of 128 =
  7. 7.Half of 76 =
  8. 8.Double 18 =
  9. 9.Double 36 =
  10. 10.Half of 56 =
  11. 11.Double 68 =
  12. 12.Half of 102 =
  13. 13.Half of 138 =
  14. 14.Double 61 =
  15. 15.Double 71 =
  16. 16.Half of 178 =
  17. 17.Double 46 =
  18. 18.Half of 26 =
  19. 19.Half of 152 =
  20. 20.Double 32 =
  21. 21.Double 94 =
  22. 22.Double 69 =
  23. 23.Half of 144 =
  24. 24.Double 12 =
  25. 25.Double 41 =
  26. 26.Half of 164 =
  27. 27.Double 83 =
  28. 28.Half of 52 =
  29. 29.Double 49 =
  30. 30.Half of 78 =
  31. 31.Double 34 =
  32. 32.Double 35 =
  33. 33.Half of 122 =
  34. 34.Double 78 =
  35. 35.Half of 62 =
  36. 36.Double 31 =
  37. 37.Double 82 =
  38. 38.Double 76 =
  39. 39.Half of 24 =
  40. 40.Double 21 =

Answer key

  1. 22
  2. 22
  3. 168
  4. 172
  5. 68
  6. 64
  7. 38
  8. 36
  9. 72
  10. 28
  11. 136
  12. 51
  13. 69
  14. 122
  15. 142
  16. 89
  17. 92
  18. 13
  19. 76
  20. 64
  21. 188
  22. 138
  23. 72
  24. 24
  25. 82
  26. 82
  27. 166
  28. 26
  29. 98
  30. 39
  31. 68
  32. 70
  33. 61
  34. 156
  35. 31
  36. 62
  37. 164
  38. 152
  39. 12
  40. 42

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