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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 20 · 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 14 =
  2. 2.Half of 48 =
  3. 3.Half of 108 =
  4. 4.Half of 116 =
  5. 5.Double 34 =
  6. 6.Double 26 =
  7. 7.Half of 104 =
  8. 8.Double 12 =
  9. 9.Double 83 =
  10. 10.Double 61 =
  11. 11.Double 77 =
  12. 12.Half of 192 =
  13. 13.Half of 38 =
  14. 14.Double 98 =
  15. 15.Half of 134 =
  16. 16.Double 84 =
  17. 17.Double 28 =
  18. 18.Half of 52 =
  19. 19.Half of 168 =
  20. 20.Double 37 =
  21. 21.Double 96 =
  22. 22.Double 89 =
  23. 23.Double 31 =
  24. 24.Double 92 =
  25. 25.Double 91 =
  26. 26.Half of 78 =
  27. 27.Half of 186 =
  28. 28.Double 47 =
  29. 29.Double 24 =
  30. 30.Half of 36 =
  31. 31.Half of 42 =
  32. 32.Half of 172 =
  33. 33.Half of 114 =
  34. 34.Half of 128 =
  35. 35.Double 97 =
  36. 36.Half of 196 =
  37. 37.Half of 132 =
  38. 38.Double 62 =
  39. 39.Double 68 =
  40. 40.Half of 106 =

Answer key

  1. 28
  2. 24
  3. 54
  4. 58
  5. 68
  6. 52
  7. 52
  8. 24
  9. 166
  10. 122
  11. 154
  12. 96
  13. 19
  14. 196
  15. 67
  16. 168
  17. 56
  18. 26
  19. 84
  20. 74
  21. 192
  22. 178
  23. 62
  24. 184
  25. 182
  26. 39
  27. 93
  28. 94
  29. 48
  30. 18
  31. 21
  32. 86
  33. 57
  34. 64
  35. 194
  36. 98
  37. 66
  38. 124
  39. 136
  40. 53

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