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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 529 · 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 47 =
  2. 2.Double 25 =
  3. 3.Half of 38 =
  4. 4.Half of 108 =
  5. 5.Half of 82 =
  6. 6.Double 98 =
  7. 7.Double 84 =
  8. 8.Double 37 =
  9. 9.Double 68 =
  10. 10.Double 21 =
  11. 11.Double 12 =
  12. 12.Double 74 =
  13. 13.Half of 196 =
  14. 14.Half of 178 =
  15. 15.Half of 72 =
  16. 16.Double 35 =
  17. 17.Double 92 =
  18. 18.Half of 92 =
  19. 19.Double 22 =
  20. 20.Double 38 =
  21. 21.Half of 54 =
  22. 22.Double 17 =
  23. 23.Half of 116 =
  24. 24.Double 15 =
  25. 25.Half of 164 =
  26. 26.Half of 182 =
  27. 27.Double 72 =
  28. 28.Half of 102 =
  29. 29.Double 99 =
  30. 30.Half of 148 =
  31. 31.Double 51 =
  32. 32.Double 26 =
  33. 33.Double 43 =
  34. 34.Half of 152 =
  35. 35.Double 71 =
  36. 36.Double 94 =
  37. 37.Double 33 =
  38. 38.Half of 112 =
  39. 39.Half of 18 =
  40. 40.Double 31 =

Answer key

  1. 94
  2. 50
  3. 19
  4. 54
  5. 41
  6. 196
  7. 168
  8. 74
  9. 136
  10. 42
  11. 24
  12. 148
  13. 98
  14. 89
  15. 36
  16. 70
  17. 184
  18. 46
  19. 44
  20. 76
  21. 27
  22. 34
  23. 58
  24. 30
  25. 82
  26. 91
  27. 144
  28. 51
  29. 198
  30. 74
  31. 102
  32. 52
  33. 86
  34. 76
  35. 142
  36. 188
  37. 66
  38. 56
  39. 9
  40. 62

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