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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 270 · 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 134 =
  2. 2.Double 24 =
  3. 3.Double 74 =
  4. 4.Half of 34 =
  5. 5.Half of 62 =
  6. 6.Half of 74 =
  7. 7.Double 12 =
  8. 8.Double 79 =
  9. 9.Double 87 =
  10. 10.Half of 12 =
  11. 11.Double 32 =
  12. 12.Double 53 =
  13. 13.Double 82 =
  14. 14.Half of 188 =
  15. 15.Double 41 =
  16. 16.Double 92 =
  17. 17.Double 69 =
  18. 18.Half of 112 =
  19. 19.Half of 138 =
  20. 20.Double 17 =
  21. 21.Half of 58 =
  22. 22.Double 91 =
  23. 23.Double 35 =
  24. 24.Half of 172 =
  25. 25.Half of 22 =
  26. 26.Half of 178 =
  27. 27.Half of 82 =
  28. 28.Half of 32 =
  29. 29.Half of 142 =
  30. 30.Double 93 =
  31. 31.Double 49 =
  32. 32.Half of 162 =
  33. 33.Double 54 =
  34. 34.Half of 76 =
  35. 35.Double 21 =
  36. 36.Half of 42 =
  37. 37.Half of 94 =
  38. 38.Half of 68 =
  39. 39.Half of 72 =
  40. 40.Double 76 =

Answer key

  1. 67
  2. 48
  3. 148
  4. 17
  5. 31
  6. 37
  7. 24
  8. 158
  9. 174
  10. 6
  11. 64
  12. 106
  13. 164
  14. 94
  15. 82
  16. 184
  17. 138
  18. 56
  19. 69
  20. 34
  21. 29
  22. 182
  23. 70
  24. 86
  25. 11
  26. 89
  27. 41
  28. 16
  29. 71
  30. 186
  31. 98
  32. 81
  33. 108
  34. 38
  35. 42
  36. 21
  37. 47
  38. 34
  39. 36
  40. 152

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