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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 161 · 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 44 =
  2. 2.Half of 152 =
  3. 3.Double 12 =
  4. 4.Double 48 =
  5. 5.Double 23 =
  6. 6.Half of 18 =
  7. 7.Half of 84 =
  8. 8.Double 26 =
  9. 9.Double 42 =
  10. 10.Half of 66 =
  11. 11.Half of 164 =
  12. 12.Half of 26 =
  13. 13.Half of 94 =
  14. 14.Double 99 =
  15. 15.Half of 64 =
  16. 16.Half of 48 =
  17. 17.Half of 192 =
  18. 18.Double 58 =
  19. 19.Half of 156 =
  20. 20.Double 69 =
  21. 21.Double 61 =
  22. 22.Half of 176 =
  23. 23.Double 14 =
  24. 24.Double 25 =
  25. 25.Half of 142 =
  26. 26.Half of 34 =
  27. 27.Half of 56 =
  28. 28.Half of 128 =
  29. 29.Half of 186 =
  30. 30.Double 21 =
  31. 31.Half of 42 =
  32. 32.Half of 28 =
  33. 33.Double 86 =
  34. 34.Half of 182 =
  35. 35.Double 54 =
  36. 36.Double 72 =
  37. 37.Half of 16 =
  38. 38.Half of 162 =
  39. 39.Half of 134 =
  40. 40.Double 39 =

Answer key

  1. 22
  2. 76
  3. 24
  4. 96
  5. 46
  6. 9
  7. 42
  8. 52
  9. 84
  10. 33
  11. 82
  12. 13
  13. 47
  14. 198
  15. 32
  16. 24
  17. 96
  18. 116
  19. 78
  20. 138
  21. 122
  22. 88
  23. 28
  24. 50
  25. 71
  26. 17
  27. 28
  28. 64
  29. 93
  30. 42
  31. 21
  32. 14
  33. 172
  34. 91
  35. 108
  36. 144
  37. 8
  38. 81
  39. 67
  40. 78

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