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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 148 · 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 24 =
  2. 2.Double 64 =
  3. 3.Half of 22 =
  4. 4.Half of 184 =
  5. 5.Double 22 =
  6. 6.Half of 156 =
  7. 7.Half of 192 =
  8. 8.Double 72 =
  9. 9.Half of 134 =
  10. 10.Double 42 =
  11. 11.Double 98 =
  12. 12.Double 75 =
  13. 13.Half of 46 =
  14. 14.Double 88 =
  15. 15.Double 31 =
  16. 16.Double 77 =
  17. 17.Half of 164 =
  18. 18.Double 81 =
  19. 19.Half of 18 =
  20. 20.Double 17 =
  21. 21.Half of 108 =
  22. 22.Double 51 =
  23. 23.Half of 176 =
  24. 24.Double 21 =
  25. 25.Double 48 =
  26. 26.Half of 186 =
  27. 27.Double 55 =
  28. 28.Half of 24 =
  29. 29.Half of 92 =
  30. 30.Half of 152 =
  31. 31.Double 23 =
  32. 32.Double 37 =
  33. 33.Half of 26 =
  34. 34.Half of 102 =
  35. 35.Half of 36 =
  36. 36.Half of 98 =
  37. 37.Half of 112 =
  38. 38.Half of 136 =
  39. 39.Half of 66 =
  40. 40.Half of 42 =

Answer key

  1. 48
  2. 128
  3. 11
  4. 92
  5. 44
  6. 78
  7. 96
  8. 144
  9. 67
  10. 84
  11. 196
  12. 150
  13. 23
  14. 176
  15. 62
  16. 154
  17. 82
  18. 162
  19. 9
  20. 34
  21. 54
  22. 102
  23. 88
  24. 42
  25. 96
  26. 93
  27. 110
  28. 12
  29. 46
  30. 76
  31. 46
  32. 74
  33. 13
  34. 51
  35. 18
  36. 49
  37. 56
  38. 68
  39. 33
  40. 21

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