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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 713 · 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 28 =
  2. 2.Double 33 =
  3. 3.Double 61 =
  4. 4.Half of 192 =
  5. 5.Double 69 =
  6. 6.Double 39 =
  7. 7.Half of 182 =
  8. 8.Half of 102 =
  9. 9.Half of 178 =
  10. 10.Double 95 =
  11. 11.Double 99 =
  12. 12.Half of 86 =
  13. 13.Double 15 =
  14. 14.Half of 92 =
  15. 15.Half of 196 =
  16. 16.Double 58 =
  17. 17.Half of 42 =
  18. 18.Double 21 =
  19. 19.Double 63 =
  20. 20.Double 14 =
  21. 21.Double 76 =
  22. 22.Double 23 =
  23. 23.Half of 138 =
  24. 24.Half of 136 =
  25. 25.Half of 66 =
  26. 26.Double 67 =
  27. 27.Double 29 =
  28. 28.Half of 62 =
  29. 29.Half of 132 =
  30. 30.Double 41 =
  31. 31.Half of 22 =
  32. 32.Half of 116 =
  33. 33.Double 28 =
  34. 34.Double 45 =
  35. 35.Double 26 =
  36. 36.Half of 58 =
  37. 37.Double 74 =
  38. 38.Half of 146 =
  39. 39.Half of 34 =
  40. 40.Half of 24 =

Answer key

  1. 14
  2. 66
  3. 122
  4. 96
  5. 138
  6. 78
  7. 91
  8. 51
  9. 89
  10. 190
  11. 198
  12. 43
  13. 30
  14. 46
  15. 98
  16. 116
  17. 21
  18. 42
  19. 126
  20. 28
  21. 152
  22. 46
  23. 69
  24. 68
  25. 33
  26. 134
  27. 58
  28. 31
  29. 66
  30. 82
  31. 11
  32. 58
  33. 56
  34. 90
  35. 52
  36. 29
  37. 148
  38. 73
  39. 17
  40. 12

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