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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 578 · 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 134 =
  2. 2.Double 86 =
  3. 3.Double 57 =
  4. 4.Half of 102 =
  5. 5.Half of 34 =
  6. 6.Double 26 =
  7. 7.Half of 156 =
  8. 8.Half of 58 =
  9. 9.Half of 152 =
  10. 10.Half of 38 =
  11. 11.Half of 14 =
  12. 12.Half of 46 =
  13. 13.Half of 28 =
  14. 14.Double 56 =
  15. 15.Half of 78 =
  16. 16.Half of 86 =
  17. 17.Double 28 =
  18. 18.Half of 42 =
  19. 19.Double 52 =
  20. 20.Half of 64 =
  21. 21.Half of 198 =
  22. 22.Double 71 =
  23. 23.Double 15 =
  24. 24.Double 44 =
  25. 25.Double 13 =
  26. 26.Half of 12 =
  27. 27.Half of 142 =
  28. 28.Double 67 =
  29. 29.Double 46 =
  30. 30.Double 31 =
  31. 31.Double 81 =
  32. 32.Double 88 =
  33. 33.Double 42 =
  34. 34.Double 11 =
  35. 35.Half of 166 =
  36. 36.Half of 144 =
  37. 37.Double 69 =
  38. 38.Double 18 =
  39. 39.Double 78 =
  40. 40.Half of 66 =

Answer key

  1. 67
  2. 172
  3. 114
  4. 51
  5. 17
  6. 52
  7. 78
  8. 29
  9. 76
  10. 19
  11. 7
  12. 23
  13. 14
  14. 112
  15. 39
  16. 43
  17. 56
  18. 21
  19. 104
  20. 32
  21. 99
  22. 142
  23. 30
  24. 88
  25. 26
  26. 6
  27. 71
  28. 134
  29. 92
  30. 62
  31. 162
  32. 176
  33. 84
  34. 22
  35. 83
  36. 72
  37. 138
  38. 36
  39. 156
  40. 33

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