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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 600 · 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 91 =
  2. 2.Half of 98 =
  3. 3.Half of 18 =
  4. 4.Double 62 =
  5. 5.Half of 102 =
  6. 6.Half of 72 =
  7. 7.Half of 24 =
  8. 8.Double 15 =
  9. 9.Double 78 =
  10. 10.Double 12 =
  11. 11.Half of 112 =
  12. 12.Double 96 =
  13. 13.Half of 156 =
  14. 14.Half of 168 =
  15. 15.Half of 134 =
  16. 16.Half of 38 =
  17. 17.Double 23 =
  18. 18.Half of 74 =
  19. 19.Double 14 =
  20. 20.Half of 116 =
  21. 21.Half of 138 =
  22. 22.Half of 86 =
  23. 23.Double 72 =
  24. 24.Double 88 =
  25. 25.Double 34 =
  26. 26.Double 99 =
  27. 27.Half of 142 =
  28. 28.Half of 16 =
  29. 29.Double 31 =
  30. 30.Half of 58 =
  31. 31.Half of 22 =
  32. 32.Double 86 =
  33. 33.Double 92 =
  34. 34.Half of 118 =
  35. 35.Half of 46 =
  36. 36.Double 84 =
  37. 37.Double 97 =
  38. 38.Double 93 =
  39. 39.Half of 62 =
  40. 40.Double 98 =

Answer key

  1. 182
  2. 49
  3. 9
  4. 124
  5. 51
  6. 36
  7. 12
  8. 30
  9. 156
  10. 24
  11. 56
  12. 192
  13. 78
  14. 84
  15. 67
  16. 19
  17. 46
  18. 37
  19. 28
  20. 58
  21. 69
  22. 43
  23. 144
  24. 176
  25. 68
  26. 198
  27. 71
  28. 8
  29. 62
  30. 29
  31. 11
  32. 172
  33. 184
  34. 59
  35. 23
  36. 168
  37. 194
  38. 186
  39. 31
  40. 196

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