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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 391 · 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 47 =
  2. 2.Double 36 =
  3. 3.Half of 56 =
  4. 4.Double 48 =
  5. 5.Double 87 =
  6. 6.Half of 192 =
  7. 7.Double 43 =
  8. 8.Double 75 =
  9. 9.Half of 162 =
  10. 10.Double 93 =
  11. 11.Double 17 =
  12. 12.Double 71 =
  13. 13.Half of 118 =
  14. 14.Double 15 =
  15. 15.Double 11 =
  16. 16.Double 64 =
  17. 17.Double 32 =
  18. 18.Half of 132 =
  19. 19.Half of 22 =
  20. 20.Double 92 =
  21. 21.Double 69 =
  22. 22.Double 55 =
  23. 23.Half of 112 =
  24. 24.Half of 108 =
  25. 25.Double 67 =
  26. 26.Half of 26 =
  27. 27.Double 99 =
  28. 28.Half of 176 =
  29. 29.Double 56 =
  30. 30.Half of 54 =
  31. 31.Half of 66 =
  32. 32.Double 33 =
  33. 33.Half of 172 =
  34. 34.Half of 168 =
  35. 35.Half of 182 =
  36. 36.Double 84 =
  37. 37.Double 25 =
  38. 38.Half of 164 =
  39. 39.Double 57 =
  40. 40.Half of 18 =

Answer key

  1. 94
  2. 72
  3. 28
  4. 96
  5. 174
  6. 96
  7. 86
  8. 150
  9. 81
  10. 186
  11. 34
  12. 142
  13. 59
  14. 30
  15. 22
  16. 128
  17. 64
  18. 66
  19. 11
  20. 184
  21. 138
  22. 110
  23. 56
  24. 54
  25. 134
  26. 13
  27. 198
  28. 88
  29. 112
  30. 27
  31. 33
  32. 66
  33. 86
  34. 84
  35. 91
  36. 168
  37. 50
  38. 82
  39. 114
  40. 9

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