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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 598 · 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 95 =
  2. 2.Double 19 =
  3. 3.Half of 36 =
  4. 4.Half of 98 =
  5. 5.Half of 162 =
  6. 6.Double 57 =
  7. 7.Half of 86 =
  8. 8.Double 91 =
  9. 9.Double 16 =
  10. 10.Double 29 =
  11. 11.Half of 168 =
  12. 12.Half of 164 =
  13. 13.Double 81 =
  14. 14.Double 18 =
  15. 15.Half of 102 =
  16. 16.Double 98 =
  17. 17.Half of 92 =
  18. 18.Double 69 =
  19. 19.Double 33 =
  20. 20.Half of 62 =
  21. 21.Double 31 =
  22. 22.Half of 72 =
  23. 23.Double 93 =
  24. 24.Double 12 =
  25. 25.Half of 42 =
  26. 26.Half of 192 =
  27. 27.Half of 88 =
  28. 28.Double 52 =
  29. 29.Half of 132 =
  30. 30.Half of 114 =
  31. 31.Half of 154 =
  32. 32.Half of 22 =
  33. 33.Double 41 =
  34. 34.Half of 32 =
  35. 35.Double 68 =
  36. 36.Half of 142 =
  37. 37.Half of 16 =
  38. 38.Double 82 =
  39. 39.Half of 82 =
  40. 40.Double 65 =

Answer key

  1. 190
  2. 38
  3. 18
  4. 49
  5. 81
  6. 114
  7. 43
  8. 182
  9. 32
  10. 58
  11. 84
  12. 82
  13. 162
  14. 36
  15. 51
  16. 196
  17. 46
  18. 138
  19. 66
  20. 31
  21. 62
  22. 36
  23. 186
  24. 24
  25. 21
  26. 96
  27. 44
  28. 104
  29. 66
  30. 57
  31. 77
  32. 11
  33. 82
  34. 16
  35. 136
  36. 71
  37. 8
  38. 164
  39. 41
  40. 130

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