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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 390 · 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 192 =
  2. 2.Double 86 =
  3. 3.Double 45 =
  4. 4.Double 93 =
  5. 5.Half of 182 =
  6. 6.Half of 124 =
  7. 7.Double 89 =
  8. 8.Double 94 =
  9. 9.Half of 138 =
  10. 10.Double 57 =
  11. 11.Half of 106 =
  12. 12.Double 52 =
  13. 13.Half of 22 =
  14. 14.Double 62 =
  15. 15.Double 37 =
  16. 16.Double 61 =
  17. 17.Half of 82 =
  18. 18.Double 19 =
  19. 19.Double 91 =
  20. 20.Half of 86 =
  21. 21.Half of 174 =
  22. 22.Half of 52 =
  23. 23.Double 41 =
  24. 24.Double 96 =
  25. 25.Half of 18 =
  26. 26.Half of 72 =
  27. 27.Double 55 =
  28. 28.Double 22 =
  29. 29.Double 78 =
  30. 30.Half of 102 =
  31. 31.Double 27 =
  32. 32.Double 16 =
  33. 33.Double 18 =
  34. 34.Half of 178 =
  35. 35.Double 84 =
  36. 36.Double 56 =
  37. 37.Double 77 =
  38. 38.Half of 38 =
  39. 39.Half of 116 =
  40. 40.Double 31 =

Answer key

  1. 96
  2. 172
  3. 90
  4. 186
  5. 91
  6. 62
  7. 178
  8. 188
  9. 69
  10. 114
  11. 53
  12. 104
  13. 11
  14. 124
  15. 74
  16. 122
  17. 41
  18. 38
  19. 182
  20. 43
  21. 87
  22. 26
  23. 82
  24. 192
  25. 9
  26. 36
  27. 110
  28. 44
  29. 156
  30. 51
  31. 54
  32. 32
  33. 36
  34. 89
  35. 168
  36. 112
  37. 154
  38. 19
  39. 58
  40. 62

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