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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 766 · 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 14 =
  2. 2.Double 54 =
  3. 3.Half of 58 =
  4. 4.Half of 52 =
  5. 5.Double 36 =
  6. 6.Double 12 =
  7. 7.Double 41 =
  8. 8.Double 28 =
  9. 9.Double 98 =
  10. 10.Double 92 =
  11. 11.Double 94 =
  12. 12.Half of 158 =
  13. 13.Half of 168 =
  14. 14.Half of 64 =
  15. 15.Double 83 =
  16. 16.Double 18 =
  17. 17.Half of 14 =
  18. 18.Double 88 =
  19. 19.Double 78 =
  20. 20.Half of 106 =
  21. 21.Double 29 =
  22. 22.Half of 166 =
  23. 23.Double 26 =
  24. 24.Half of 72 =
  25. 25.Double 33 =
  26. 26.Double 72 =
  27. 27.Half of 132 =
  28. 28.Half of 16 =
  29. 29.Half of 86 =
  30. 30.Half of 46 =
  31. 31.Half of 94 =
  32. 32.Double 93 =
  33. 33.Half of 162 =
  34. 34.Half of 108 =
  35. 35.Half of 54 =
  36. 36.Double 66 =
  37. 37.Double 47 =
  38. 38.Half of 148 =
  39. 39.Half of 56 =
  40. 40.Double 74 =

Answer key

  1. 28
  2. 108
  3. 29
  4. 26
  5. 72
  6. 24
  7. 82
  8. 56
  9. 196
  10. 184
  11. 188
  12. 79
  13. 84
  14. 32
  15. 166
  16. 36
  17. 7
  18. 176
  19. 156
  20. 53
  21. 58
  22. 83
  23. 52
  24. 36
  25. 66
  26. 144
  27. 66
  28. 8
  29. 43
  30. 23
  31. 47
  32. 186
  33. 81
  34. 54
  35. 27
  36. 132
  37. 94
  38. 74
  39. 28
  40. 148

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