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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 470 · 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 22 =
  2. 2.Half of 194 =
  3. 3.Double 96 =
  4. 4.Double 21 =
  5. 5.Half of 44 =
  6. 6.Half of 92 =
  7. 7.Double 36 =
  8. 8.Half of 144 =
  9. 9.Double 19 =
  10. 10.Double 89 =
  11. 11.Half of 174 =
  12. 12.Half of 96 =
  13. 13.Half of 52 =
  14. 14.Double 31 =
  15. 15.Double 54 =
  16. 16.Double 24 =
  17. 17.Half of 136 =
  18. 18.Half of 102 =
  19. 19.Half of 104 =
  20. 20.Double 67 =
  21. 21.Double 34 =
  22. 22.Double 79 =
  23. 23.Double 68 =
  24. 24.Double 45 =
  25. 25.Double 87 =
  26. 26.Double 64 =
  27. 27.Double 38 =
  28. 28.Half of 32 =
  29. 29.Half of 124 =
  30. 30.Double 99 =
  31. 31.Double 14 =
  32. 32.Double 39 =
  33. 33.Double 43 =
  34. 34.Half of 172 =
  35. 35.Half of 192 =
  36. 36.Half of 122 =
  37. 37.Double 46 =
  38. 38.Half of 198 =
  39. 39.Double 59 =
  40. 40.Half of 18 =

Answer key

  1. 44
  2. 97
  3. 192
  4. 42
  5. 22
  6. 46
  7. 72
  8. 72
  9. 38
  10. 178
  11. 87
  12. 48
  13. 26
  14. 62
  15. 108
  16. 48
  17. 68
  18. 51
  19. 52
  20. 134
  21. 68
  22. 158
  23. 136
  24. 90
  25. 174
  26. 128
  27. 76
  28. 16
  29. 62
  30. 198
  31. 28
  32. 78
  33. 86
  34. 86
  35. 96
  36. 61
  37. 92
  38. 99
  39. 118
  40. 9

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