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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 308 · 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 46 =
  2. 2.Half of 132 =
  3. 3.Half of 62 =
  4. 4.Half of 54 =
  5. 5.Half of 68 =
  6. 6.Double 43 =
  7. 7.Half of 48 =
  8. 8.Double 86 =
  9. 9.Double 51 =
  10. 10.Double 59 =
  11. 11.Double 55 =
  12. 12.Half of 42 =
  13. 13.Half of 76 =
  14. 14.Half of 134 =
  15. 15.Double 78 =
  16. 16.Double 16 =
  17. 17.Double 85 =
  18. 18.Double 81 =
  19. 19.Half of 34 =
  20. 20.Double 68 =
  21. 21.Half of 188 =
  22. 22.Double 91 =
  23. 23.Double 41 =
  24. 24.Half of 172 =
  25. 25.Double 75 =
  26. 26.Half of 142 =
  27. 27.Double 47 =
  28. 28.Double 21 =
  29. 29.Half of 122 =
  30. 30.Half of 168 =
  31. 31.Half of 92 =
  32. 32.Double 18 =
  33. 33.Double 37 =
  34. 34.Double 32 =
  35. 35.Double 93 =
  36. 36.Double 88 =
  37. 37.Double 34 =
  38. 38.Half of 28 =
  39. 39.Double 39 =
  40. 40.Half of 56 =

Answer key

  1. 23
  2. 66
  3. 31
  4. 27
  5. 34
  6. 86
  7. 24
  8. 172
  9. 102
  10. 118
  11. 110
  12. 21
  13. 38
  14. 67
  15. 156
  16. 32
  17. 170
  18. 162
  19. 17
  20. 136
  21. 94
  22. 182
  23. 82
  24. 86
  25. 150
  26. 71
  27. 94
  28. 42
  29. 61
  30. 84
  31. 46
  32. 36
  33. 74
  34. 64
  35. 186
  36. 176
  37. 68
  38. 14
  39. 78
  40. 28

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