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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 496 · 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 86 =
  2. 2.Double 44 =
  3. 3.Double 89 =
  4. 4.Half of 88 =
  5. 5.Half of 134 =
  6. 6.Double 84 =
  7. 7.Double 81 =
  8. 8.Half of 94 =
  9. 9.Double 54 =
  10. 10.Double 45 =
  11. 11.Double 13 =
  12. 12.Double 77 =
  13. 13.Double 41 =
  14. 14.Half of 146 =
  15. 15.Double 38 =
  16. 16.Double 23 =
  17. 17.Double 71 =
  18. 18.Half of 118 =
  19. 19.Double 43 =
  20. 20.Half of 152 =
  21. 21.Double 42 =
  22. 22.Double 98 =
  23. 23.Double 51 =
  24. 24.Double 33 =
  25. 25.Double 65 =
  26. 26.Double 31 =
  27. 27.Half of 24 =
  28. 28.Double 79 =
  29. 29.Double 92 =
  30. 30.Half of 22 =
  31. 31.Double 75 =
  32. 32.Half of 18 =
  33. 33.Double 46 =
  34. 34.Half of 182 =
  35. 35.Half of 136 =
  36. 36.Half of 172 =
  37. 37.Half of 16 =
  38. 38.Half of 68 =
  39. 39.Half of 48 =
  40. 40.Double 67 =

Answer key

  1. 172
  2. 88
  3. 178
  4. 44
  5. 67
  6. 168
  7. 162
  8. 47
  9. 108
  10. 90
  11. 26
  12. 154
  13. 82
  14. 73
  15. 76
  16. 46
  17. 142
  18. 59
  19. 86
  20. 76
  21. 84
  22. 196
  23. 102
  24. 66
  25. 130
  26. 62
  27. 12
  28. 158
  29. 184
  30. 11
  31. 150
  32. 9
  33. 92
  34. 91
  35. 68
  36. 86
  37. 8
  38. 34
  39. 24
  40. 134

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