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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 144 · 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 38 =
  2. 2.Half of 132 =
  3. 3.Double 74 =
  4. 4.Half of 62 =
  5. 5.Half of 152 =
  6. 6.Half of 128 =
  7. 7.Half of 76 =
  8. 8.Half of 88 =
  9. 9.Double 25 =
  10. 10.Double 11 =
  11. 11.Double 92 =
  12. 12.Double 47 =
  13. 13.Double 51 =
  14. 14.Double 73 =
  15. 15.Double 26 =
  16. 16.Double 64 =
  17. 17.Half of 22 =
  18. 18.Double 28 =
  19. 19.Double 86 =
  20. 20.Double 81 =
  21. 21.Half of 102 =
  22. 22.Double 41 =
  23. 23.Half of 166 =
  24. 24.Double 29 =
  25. 25.Half of 72 =
  26. 26.Double 72 =
  27. 27.Double 82 =
  28. 28.Double 31 =
  29. 29.Double 56 =
  30. 30.Half of 162 =
  31. 31.Half of 198 =
  32. 32.Half of 116 =
  33. 33.Double 43 =
  34. 34.Double 97 =
  35. 35.Half of 196 =
  36. 36.Double 17 =
  37. 37.Half of 42 =
  38. 38.Double 76 =
  39. 39.Double 99 =
  40. 40.Double 14 =

Answer key

  1. 76
  2. 66
  3. 148
  4. 31
  5. 76
  6. 64
  7. 38
  8. 44
  9. 50
  10. 22
  11. 184
  12. 94
  13. 102
  14. 146
  15. 52
  16. 128
  17. 11
  18. 56
  19. 172
  20. 162
  21. 51
  22. 82
  23. 83
  24. 58
  25. 36
  26. 144
  27. 164
  28. 62
  29. 112
  30. 81
  31. 99
  32. 58
  33. 86
  34. 194
  35. 98
  36. 34
  37. 21
  38. 152
  39. 198
  40. 28

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