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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 547 · 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 78 =
  2. 2.Half of 14 =
  3. 3.Half of 56 =
  4. 4.Double 44 =
  5. 5.Half of 74 =
  6. 6.Double 85 =
  7. 7.Half of 128 =
  8. 8.Double 81 =
  9. 9.Half of 88 =
  10. 10.Half of 76 =
  11. 11.Half of 34 =
  12. 12.Half of 126 =
  13. 13.Double 76 =
  14. 14.Half of 188 =
  15. 15.Double 11 =
  16. 16.Half of 52 =
  17. 17.Double 32 =
  18. 18.Half of 134 =
  19. 19.Half of 116 =
  20. 20.Half of 192 =
  21. 21.Double 71 =
  22. 22.Half of 86 =
  23. 23.Half of 152 =
  24. 24.Half of 48 =
  25. 25.Half of 54 =
  26. 26.Half of 96 =
  27. 27.Half of 38 =
  28. 28.Double 31 =
  29. 29.Double 99 =
  30. 30.Double 22 =
  31. 31.Double 74 =
  32. 32.Double 21 =
  33. 33.Double 25 =
  34. 34.Half of 164 =
  35. 35.Double 28 =
  36. 36.Half of 42 =
  37. 37.Double 24 =
  38. 38.Half of 196 =
  39. 39.Double 75 =
  40. 40.Half of 124 =

Answer key

  1. 39
  2. 7
  3. 28
  4. 88
  5. 37
  6. 170
  7. 64
  8. 162
  9. 44
  10. 38
  11. 17
  12. 63
  13. 152
  14. 94
  15. 22
  16. 26
  17. 64
  18. 67
  19. 58
  20. 96
  21. 142
  22. 43
  23. 76
  24. 24
  25. 27
  26. 48
  27. 19
  28. 62
  29. 198
  30. 44
  31. 148
  32. 42
  33. 50
  34. 82
  35. 56
  36. 21
  37. 48
  38. 98
  39. 150
  40. 62

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