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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 337 · 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 25 =
  2. 2.Double 98 =
  3. 3.Half of 94 =
  4. 4.Double 96 =
  5. 5.Half of 112 =
  6. 6.Double 59 =
  7. 7.Double 76 =
  8. 8.Double 82 =
  9. 9.Half of 32 =
  10. 10.Double 87 =
  11. 11.Double 62 =
  12. 12.Double 84 =
  13. 13.Double 52 =
  14. 14.Half of 186 =
  15. 15.Double 95 =
  16. 16.Double 42 =
  17. 17.Half of 18 =
  18. 18.Double 45 =
  19. 19.Double 79 =
  20. 20.Half of 54 =
  21. 21.Half of 152 =
  22. 22.Half of 28 =
  23. 23.Half of 68 =
  24. 24.Double 73 =
  25. 25.Double 19 =
  26. 26.Double 17 =
  27. 27.Double 26 =
  28. 28.Half of 142 =
  29. 29.Half of 124 =
  30. 30.Double 85 =
  31. 31.Half of 106 =
  32. 32.Half of 26 =
  33. 33.Half of 22 =
  34. 34.Half of 146 =
  35. 35.Half of 24 =
  36. 36.Half of 36 =
  37. 37.Double 81 =
  38. 38.Half of 56 =
  39. 39.Double 83 =
  40. 40.Double 23 =

Answer key

  1. 50
  2. 196
  3. 47
  4. 192
  5. 56
  6. 118
  7. 152
  8. 164
  9. 16
  10. 174
  11. 124
  12. 168
  13. 104
  14. 93
  15. 190
  16. 84
  17. 9
  18. 90
  19. 158
  20. 27
  21. 76
  22. 14
  23. 34
  24. 146
  25. 38
  26. 34
  27. 52
  28. 71
  29. 62
  30. 170
  31. 53
  32. 13
  33. 11
  34. 73
  35. 12
  36. 18
  37. 162
  38. 28
  39. 166
  40. 46

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