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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 251 · 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 81 =
  2. 2.Double 41 =
  3. 3.Half of 62 =
  4. 4.Half of 12 =
  5. 5.Half of 78 =
  6. 6.Half of 18 =
  7. 7.Double 24 =
  8. 8.Double 31 =
  9. 9.Double 95 =
  10. 10.Double 33 =
  11. 11.Double 73 =
  12. 12.Half of 102 =
  13. 13.Half of 122 =
  14. 14.Half of 118 =
  15. 15.Half of 42 =
  16. 16.Double 34 =
  17. 17.Double 21 =
  18. 18.Double 97 =
  19. 19.Half of 74 =
  20. 20.Double 77 =
  21. 21.Half of 116 =
  22. 22.Half of 92 =
  23. 23.Double 15 =
  24. 24.Double 17 =
  25. 25.Half of 64 =
  26. 26.Half of 34 =
  27. 27.Half of 14 =
  28. 28.Double 74 =
  29. 29.Half of 52 =
  30. 30.Half of 182 =
  31. 31.Double 88 =
  32. 32.Double 28 =
  33. 33.Half of 22 =
  34. 34.Double 65 =
  35. 35.Double 93 =
  36. 36.Half of 148 =
  37. 37.Half of 192 =
  38. 38.Half of 36 =
  39. 39.Half of 198 =
  40. 40.Double 26 =

Answer key

  1. 162
  2. 82
  3. 31
  4. 6
  5. 39
  6. 9
  7. 48
  8. 62
  9. 190
  10. 66
  11. 146
  12. 51
  13. 61
  14. 59
  15. 21
  16. 68
  17. 42
  18. 194
  19. 37
  20. 154
  21. 58
  22. 46
  23. 30
  24. 34
  25. 32
  26. 17
  27. 7
  28. 148
  29. 26
  30. 91
  31. 176
  32. 56
  33. 11
  34. 130
  35. 186
  36. 74
  37. 96
  38. 18
  39. 99
  40. 52

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