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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 384 · 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 61 =
  2. 2.Half of 102 =
  3. 3.Half of 38 =
  4. 4.Double 71 =
  5. 5.Half of 52 =
  6. 6.Half of 68 =
  7. 7.Half of 22 =
  8. 8.Double 74 =
  9. 9.Half of 132 =
  10. 10.Half of 18 =
  11. 11.Half of 92 =
  12. 12.Double 78 =
  13. 13.Half of 174 =
  14. 14.Half of 26 =
  15. 15.Double 27 =
  16. 16.Double 41 =
  17. 17.Double 31 =
  18. 18.Half of 192 =
  19. 19.Half of 172 =
  20. 20.Half of 16 =
  21. 21.Double 22 =
  22. 22.Double 99 =
  23. 23.Half of 82 =
  24. 24.Half of 112 =
  25. 25.Half of 44 =
  26. 26.Double 92 =
  27. 27.Double 35 =
  28. 28.Double 14 =
  29. 29.Double 62 =
  30. 30.Double 51 =
  31. 31.Double 45 =
  32. 32.Double 16 =
  33. 33.Half of 76 =
  34. 34.Double 36 =
  35. 35.Double 28 =
  36. 36.Double 72 =
  37. 37.Half of 62 =
  38. 38.Double 87 =
  39. 39.Double 83 =
  40. 40.Double 26 =

Answer key

  1. 122
  2. 51
  3. 19
  4. 142
  5. 26
  6. 34
  7. 11
  8. 148
  9. 66
  10. 9
  11. 46
  12. 156
  13. 87
  14. 13
  15. 54
  16. 82
  17. 62
  18. 96
  19. 86
  20. 8
  21. 44
  22. 198
  23. 41
  24. 56
  25. 22
  26. 184
  27. 70
  28. 28
  29. 124
  30. 102
  31. 90
  32. 32
  33. 38
  34. 72
  35. 56
  36. 144
  37. 31
  38. 174
  39. 166
  40. 52

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