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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 141 · 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 62 =
  2. 2.Half of 34 =
  3. 3.Double 21 =
  4. 4.Double 82 =
  5. 5.Half of 168 =
  6. 6.Half of 46 =
  7. 7.Double 39 =
  8. 8.Double 14 =
  9. 9.Half of 38 =
  10. 10.Double 36 =
  11. 11.Double 22 =
  12. 12.Half of 104 =
  13. 13.Half of 132 =
  14. 14.Double 86 =
  15. 15.Double 79 =
  16. 16.Double 89 =
  17. 17.Double 68 =
  18. 18.Double 17 =
  19. 19.Half of 92 =
  20. 20.Double 58 =
  21. 21.Half of 82 =
  22. 22.Double 98 =
  23. 23.Half of 94 =
  24. 24.Double 64 =
  25. 25.Double 45 =
  26. 26.Half of 42 =
  27. 27.Double 47 =
  28. 28.Half of 62 =
  29. 29.Double 33 =
  30. 30.Double 23 =
  31. 31.Double 13 =
  32. 32.Double 63 =
  33. 33.Double 61 =
  34. 34.Half of 124 =
  35. 35.Double 83 =
  36. 36.Half of 144 =
  37. 37.Double 31 =
  38. 38.Half of 192 =
  39. 39.Half of 74 =
  40. 40.Double 85 =

Answer key

  1. 124
  2. 17
  3. 42
  4. 164
  5. 84
  6. 23
  7. 78
  8. 28
  9. 19
  10. 72
  11. 44
  12. 52
  13. 66
  14. 172
  15. 158
  16. 178
  17. 136
  18. 34
  19. 46
  20. 116
  21. 41
  22. 196
  23. 47
  24. 128
  25. 90
  26. 21
  27. 94
  28. 31
  29. 66
  30. 46
  31. 26
  32. 126
  33. 122
  34. 62
  35. 166
  36. 72
  37. 62
  38. 96
  39. 37
  40. 170

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