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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 234 · 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 92 =
  2. 2.Double 99 =
  3. 3.Half of 108 =
  4. 4.Half of 192 =
  5. 5.Half of 106 =
  6. 6.Double 65 =
  7. 7.Double 59 =
  8. 8.Half of 64 =
  9. 9.Half of 112 =
  10. 10.Half of 68 =
  11. 11.Half of 194 =
  12. 12.Double 86 =
  13. 13.Half of 122 =
  14. 14.Half of 78 =
  15. 15.Double 44 =
  16. 16.Double 13 =
  17. 17.Double 45 =
  18. 18.Double 18 =
  19. 19.Double 51 =
  20. 20.Double 31 =
  21. 21.Half of 12 =
  22. 22.Double 84 =
  23. 23.Double 17 =
  24. 24.Double 72 =
  25. 25.Double 57 =
  26. 26.Half of 52 =
  27. 27.Double 71 =
  28. 28.Half of 86 =
  29. 29.Double 95 =
  30. 30.Double 14 =
  31. 31.Half of 74 =
  32. 32.Half of 172 =
  33. 33.Half of 102 =
  34. 34.Half of 26 =
  35. 35.Half of 88 =
  36. 36.Double 12 =
  37. 37.Half of 36 =
  38. 38.Half of 42 =
  39. 39.Double 81 =
  40. 40.Double 23 =

Answer key

  1. 184
  2. 198
  3. 54
  4. 96
  5. 53
  6. 130
  7. 118
  8. 32
  9. 56
  10. 34
  11. 97
  12. 172
  13. 61
  14. 39
  15. 88
  16. 26
  17. 90
  18. 36
  19. 102
  20. 62
  21. 6
  22. 168
  23. 34
  24. 144
  25. 114
  26. 26
  27. 142
  28. 43
  29. 190
  30. 28
  31. 37
  32. 86
  33. 51
  34. 13
  35. 44
  36. 24
  37. 18
  38. 21
  39. 162
  40. 46

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