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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 724 · 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 17 =
  2. 2.Half of 132 =
  3. 3.Double 99 =
  4. 4.Double 91 =
  5. 5.Double 66 =
  6. 6.Double 63 =
  7. 7.Half of 38 =
  8. 8.Half of 36 =
  9. 9.Double 36 =
  10. 10.Double 89 =
  11. 11.Half of 32 =
  12. 12.Half of 182 =
  13. 13.Half of 24 =
  14. 14.Half of 194 =
  15. 15.Double 28 =
  16. 16.Double 92 =
  17. 17.Double 31 =
  18. 18.Double 45 =
  19. 19.Half of 62 =
  20. 20.Double 26 =
  21. 21.Half of 28 =
  22. 22.Double 95 =
  23. 23.Half of 102 =
  24. 24.Double 51 =
  25. 25.Half of 178 =
  26. 26.Double 88 =
  27. 27.Half of 192 =
  28. 28.Half of 22 =
  29. 29.Half of 72 =
  30. 30.Double 34 =
  31. 31.Double 82 =
  32. 32.Double 84 =
  33. 33.Half of 94 =
  34. 34.Half of 118 =
  35. 35.Half of 54 =
  36. 36.Half of 144 =
  37. 37.Double 71 =
  38. 38.Double 93 =
  39. 39.Double 75 =
  40. 40.Double 54 =

Answer key

  1. 34
  2. 66
  3. 198
  4. 182
  5. 132
  6. 126
  7. 19
  8. 18
  9. 72
  10. 178
  11. 16
  12. 91
  13. 12
  14. 97
  15. 56
  16. 184
  17. 62
  18. 90
  19. 31
  20. 52
  21. 14
  22. 190
  23. 51
  24. 102
  25. 89
  26. 176
  27. 96
  28. 11
  29. 36
  30. 68
  31. 164
  32. 168
  33. 47
  34. 59
  35. 27
  36. 72
  37. 142
  38. 186
  39. 150
  40. 108

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