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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 482 · 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 68 =
  2. 2.Double 98 =
  3. 3.Double 99 =
  4. 4.Double 56 =
  5. 5.Double 95 =
  6. 6.Half of 12 =
  7. 7.Double 58 =
  8. 8.Half of 112 =
  9. 9.Half of 22 =
  10. 10.Half of 108 =
  11. 11.Double 51 =
  12. 12.Double 78 =
  13. 13.Double 66 =
  14. 14.Double 21 =
  15. 15.Double 11 =
  16. 16.Double 57 =
  17. 17.Half of 42 =
  18. 18.Double 36 =
  19. 19.Half of 162 =
  20. 20.Double 83 =
  21. 21.Half of 164 =
  22. 22.Half of 152 =
  23. 23.Half of 52 =
  24. 24.Half of 92 =
  25. 25.Double 25 =
  26. 26.Double 15 =
  27. 27.Half of 102 =
  28. 28.Double 82 =
  29. 29.Half of 192 =
  30. 30.Half of 56 =
  31. 31.Half of 122 =
  32. 32.Half of 48 =
  33. 33.Double 18 =
  34. 34.Double 64 =
  35. 35.Double 28 =
  36. 36.Double 52 =
  37. 37.Double 67 =
  38. 38.Double 77 =
  39. 39.Double 34 =
  40. 40.Double 93 =

Answer key

  1. 34
  2. 196
  3. 198
  4. 112
  5. 190
  6. 6
  7. 116
  8. 56
  9. 11
  10. 54
  11. 102
  12. 156
  13. 132
  14. 42
  15. 22
  16. 114
  17. 21
  18. 72
  19. 81
  20. 166
  21. 82
  22. 76
  23. 26
  24. 46
  25. 50
  26. 30
  27. 51
  28. 164
  29. 96
  30. 28
  31. 61
  32. 24
  33. 36
  34. 128
  35. 56
  36. 104
  37. 134
  38. 154
  39. 68
  40. 186

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