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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 260 · 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 21 =
  2. 2.Double 43 =
  3. 3.Half of 124 =
  4. 4.Double 63 =
  5. 5.Double 77 =
  6. 6.Double 69 =
  7. 7.Half of 38 =
  8. 8.Double 37 =
  9. 9.Double 67 =
  10. 10.Double 53 =
  11. 11.Double 96 =
  12. 12.Double 71 =
  13. 13.Half of 176 =
  14. 14.Double 35 =
  15. 15.Double 72 =
  16. 16.Half of 28 =
  17. 17.Double 74 =
  18. 18.Double 73 =
  19. 19.Half of 134 =
  20. 20.Half of 88 =
  21. 21.Double 83 =
  22. 22.Double 82 =
  23. 23.Double 23 =
  24. 24.Double 58 =
  25. 25.Double 31 =
  26. 26.Double 32 =
  27. 27.Double 81 =
  28. 28.Double 48 =
  29. 29.Double 94 =
  30. 30.Double 88 =
  31. 31.Half of 172 =
  32. 32.Half of 128 =
  33. 33.Double 91 =
  34. 34.Half of 74 =
  35. 35.Double 33 =
  36. 36.Half of 62 =
  37. 37.Double 39 =
  38. 38.Double 64 =
  39. 39.Half of 192 =
  40. 40.Double 78 =

Answer key

  1. 42
  2. 86
  3. 62
  4. 126
  5. 154
  6. 138
  7. 19
  8. 74
  9. 134
  10. 106
  11. 192
  12. 142
  13. 88
  14. 70
  15. 144
  16. 14
  17. 148
  18. 146
  19. 67
  20. 44
  21. 166
  22. 164
  23. 46
  24. 116
  25. 62
  26. 64
  27. 162
  28. 96
  29. 188
  30. 176
  31. 86
  32. 64
  33. 182
  34. 37
  35. 66
  36. 31
  37. 78
  38. 128
  39. 96
  40. 156

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