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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 841 · 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 97 =
  2. 2.Double 31 =
  3. 3.Double 62 =
  4. 4.Half of 108 =
  5. 5.Half of 172 =
  6. 6.Half of 144 =
  7. 7.Half of 88 =
  8. 8.Half of 16 =
  9. 9.Half of 82 =
  10. 10.Double 12 =
  11. 11.Double 11 =
  12. 12.Half of 128 =
  13. 13.Double 93 =
  14. 14.Half of 188 =
  15. 15.Half of 26 =
  16. 16.Half of 42 =
  17. 17.Double 53 =
  18. 18.Double 15 =
  19. 19.Double 76 =
  20. 20.Double 75 =
  21. 21.Double 28 =
  22. 22.Half of 152 =
  23. 23.Double 13 =
  24. 24.Double 92 =
  25. 25.Double 81 =
  26. 26.Double 21 =
  27. 27.Double 83 =
  28. 28.Half of 156 =
  29. 29.Half of 74 =
  30. 30.Half of 178 =
  31. 31.Half of 132 =
  32. 32.Half of 22 =
  33. 33.Double 36 =
  34. 34.Double 61 =
  35. 35.Double 32 =
  36. 36.Double 47 =
  37. 37.Double 23 =
  38. 38.Double 48 =
  39. 39.Double 74 =
  40. 40.Half of 38 =

Answer key

  1. 194
  2. 62
  3. 124
  4. 54
  5. 86
  6. 72
  7. 44
  8. 8
  9. 41
  10. 24
  11. 22
  12. 64
  13. 186
  14. 94
  15. 13
  16. 21
  17. 106
  18. 30
  19. 152
  20. 150
  21. 56
  22. 76
  23. 26
  24. 184
  25. 162
  26. 42
  27. 166
  28. 78
  29. 37
  30. 89
  31. 66
  32. 11
  33. 72
  34. 122
  35. 64
  36. 94
  37. 46
  38. 96
  39. 148
  40. 19

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