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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 737 · 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 172 =
  2. 2.Double 71 =
  3. 3.Double 61 =
  4. 4.Double 34 =
  5. 5.Double 32 =
  6. 6.Double 45 =
  7. 7.Double 79 =
  8. 8.Half of 122 =
  9. 9.Double 23 =
  10. 10.Double 55 =
  11. 11.Half of 136 =
  12. 12.Half of 78 =
  13. 13.Double 37 =
  14. 14.Half of 68 =
  15. 15.Double 13 =
  16. 16.Half of 102 =
  17. 17.Half of 118 =
  18. 18.Half of 132 =
  19. 19.Double 64 =
  20. 20.Double 35 =
  21. 21.Half of 162 =
  22. 22.Half of 62 =
  23. 23.Double 91 =
  24. 24.Half of 44 =
  25. 25.Double 75 =
  26. 26.Half of 24 =
  27. 27.Double 54 =
  28. 28.Half of 82 =
  29. 29.Double 17 =
  30. 30.Double 72 =
  31. 31.Half of 22 =
  32. 32.Double 51 =
  33. 33.Double 36 =
  34. 34.Half of 28 =
  35. 35.Double 66 =
  36. 36.Double 97 =
  37. 37.Double 16 =
  38. 38.Double 14 =
  39. 39.Double 43 =
  40. 40.Double 24 =

Answer key

  1. 86
  2. 142
  3. 122
  4. 68
  5. 64
  6. 90
  7. 158
  8. 61
  9. 46
  10. 110
  11. 68
  12. 39
  13. 74
  14. 34
  15. 26
  16. 51
  17. 59
  18. 66
  19. 128
  20. 70
  21. 81
  22. 31
  23. 182
  24. 22
  25. 150
  26. 12
  27. 108
  28. 41
  29. 34
  30. 144
  31. 11
  32. 102
  33. 72
  34. 14
  35. 132
  36. 194
  37. 32
  38. 28
  39. 86
  40. 48

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