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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 102 · 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 76 =
  2. 2.Half of 142 =
  3. 3.Half of 52 =
  4. 4.Double 81 =
  5. 5.Half of 126 =
  6. 6.Double 98 =
  7. 7.Double 39 =
  8. 8.Double 36 =
  9. 9.Half of 148 =
  10. 10.Double 82 =
  11. 11.Double 54 =
  12. 12.Half of 24 =
  13. 13.Half of 62 =
  14. 14.Double 18 =
  15. 15.Double 45 =
  16. 16.Double 48 =
  17. 17.Double 16 =
  18. 18.Double 31 =
  19. 19.Double 15 =
  20. 20.Half of 96 =
  21. 21.Double 71 =
  22. 22.Double 47 =
  23. 23.Half of 22 =
  24. 24.Double 23 =
  25. 25.Double 13 =
  26. 26.Double 51 =
  27. 27.Double 92 =
  28. 28.Half of 194 =
  29. 29.Half of 82 =
  30. 30.Double 58 =
  31. 31.Double 97 =
  32. 32.Double 56 =
  33. 33.Half of 26 =
  34. 34.Half of 164 =
  35. 35.Double 46 =
  36. 36.Half of 162 =
  37. 37.Half of 168 =
  38. 38.Double 95 =
  39. 39.Half of 76 =
  40. 40.Half of 192 =

Answer key

  1. 152
  2. 71
  3. 26
  4. 162
  5. 63
  6. 196
  7. 78
  8. 72
  9. 74
  10. 164
  11. 108
  12. 12
  13. 31
  14. 36
  15. 90
  16. 96
  17. 32
  18. 62
  19. 30
  20. 48
  21. 142
  22. 94
  23. 11
  24. 46
  25. 26
  26. 102
  27. 184
  28. 97
  29. 41
  30. 116
  31. 194
  32. 112
  33. 13
  34. 82
  35. 92
  36. 81
  37. 84
  38. 190
  39. 38
  40. 96

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