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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 452 · 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.Half of 34 =
  2. 2.Double 65 =
  3. 3.Double 63 =
  4. 4.Half of 88 =
  5. 5.Double 26 =
  6. 6.Double 39 =
  7. 7.Half of 124 =
  8. 8.Half of 182 =
  9. 9.Double 55 =
  10. 10.Half of 158 =
  11. 11.Half of 164 =
  12. 12.Double 76 =
  13. 13.Half of 154 =
  14. 14.Double 57 =
  15. 15.Double 14 =
  16. 16.Double 92 =
  17. 17.Half of 94 =
  18. 18.Double 72 =
  19. 19.Double 41 =
  20. 20.Double 15 =
  21. 21.Half of 82 =
  22. 22.Double 31 =
  23. 23.Half of 192 =
  24. 24.Double 19 =
  25. 25.Double 13 =
  26. 26.Half of 76 =
  27. 27.Double 45 =
  28. 28.Double 51 =
  29. 29.Half of 22 =
  30. 30.Half of 92 =
  31. 31.Double 74 =
  32. 32.Half of 142 =
  33. 33.Double 23 =
  34. 34.Half of 56 =
  35. 35.Half of 54 =
  36. 36.Double 37 =
  37. 37.Half of 152 =
  38. 38.Half of 66 =
  39. 39.Double 88 =
  40. 40.Double 21 =

Answer key

  1. 17
  2. 130
  3. 126
  4. 44
  5. 52
  6. 78
  7. 62
  8. 91
  9. 110
  10. 79
  11. 82
  12. 152
  13. 77
  14. 114
  15. 28
  16. 184
  17. 47
  18. 144
  19. 82
  20. 30
  21. 41
  22. 62
  23. 96
  24. 38
  25. 26
  26. 38
  27. 90
  28. 102
  29. 11
  30. 46
  31. 148
  32. 71
  33. 46
  34. 28
  35. 27
  36. 74
  37. 76
  38. 33
  39. 176
  40. 42

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