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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 362 · 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 13 =
  2. 2.Double 79 =
  3. 3.Double 11 =
  4. 4.Double 91 =
  5. 5.Double 86 =
  6. 6.Double 14 =
  7. 7.Double 26 =
  8. 8.Double 72 =
  9. 9.Double 69 =
  10. 10.Double 21 =
  11. 11.Half of 138 =
  12. 12.Half of 108 =
  13. 13.Half of 122 =
  14. 14.Double 28 =
  15. 15.Half of 192 =
  16. 16.Half of 118 =
  17. 17.Double 43 =
  18. 18.Half of 124 =
  19. 19.Half of 72 =
  20. 20.Double 24 =
  21. 21.Half of 46 =
  22. 22.Half of 66 =
  23. 23.Half of 32 =
  24. 24.Half of 106 =
  25. 25.Half of 62 =
  26. 26.Half of 198 =
  27. 27.Double 22 =
  28. 28.Double 18 =
  29. 29.Double 95 =
  30. 30.Double 92 =
  31. 31.Half of 12 =
  32. 32.Double 51 =
  33. 33.Half of 132 =
  34. 34.Double 75 =
  35. 35.Half of 164 =
  36. 36.Double 88 =
  37. 37.Half of 26 =
  38. 38.Half of 42 =
  39. 39.Half of 152 =
  40. 40.Half of 54 =

Answer key

  1. 26
  2. 158
  3. 22
  4. 182
  5. 172
  6. 28
  7. 52
  8. 144
  9. 138
  10. 42
  11. 69
  12. 54
  13. 61
  14. 56
  15. 96
  16. 59
  17. 86
  18. 62
  19. 36
  20. 48
  21. 23
  22. 33
  23. 16
  24. 53
  25. 31
  26. 99
  27. 44
  28. 36
  29. 190
  30. 184
  31. 6
  32. 102
  33. 66
  34. 150
  35. 82
  36. 176
  37. 13
  38. 21
  39. 76
  40. 27

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