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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 326 · 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 12 =
  2. 2.Half of 22 =
  3. 3.Double 15 =
  4. 4.Double 29 =
  5. 5.Double 18 =
  6. 6.Double 51 =
  7. 7.Double 48 =
  8. 8.Half of 98 =
  9. 9.Half of 76 =
  10. 10.Double 97 =
  11. 11.Half of 112 =
  12. 12.Half of 92 =
  13. 13.Half of 46 =
  14. 14.Double 91 =
  15. 15.Half of 142 =
  16. 16.Half of 136 =
  17. 17.Half of 172 =
  18. 18.Half of 64 =
  19. 19.Double 94 =
  20. 20.Half of 78 =
  21. 21.Half of 132 =
  22. 22.Half of 124 =
  23. 23.Half of 62 =
  24. 24.Half of 102 =
  25. 25.Double 78 =
  26. 26.Half of 38 =
  27. 27.Double 77 =
  28. 28.Double 62 =
  29. 29.Half of 34 =
  30. 30.Double 12 =
  31. 31.Half of 148 =
  32. 32.Double 61 =
  33. 33.Double 56 =
  34. 34.Half of 152 =
  35. 35.Half of 118 =
  36. 36.Double 96 =
  37. 37.Double 11 =
  38. 38.Double 37 =
  39. 39.Double 89 =
  40. 40.Half of 162 =

Answer key

  1. 6
  2. 11
  3. 30
  4. 58
  5. 36
  6. 102
  7. 96
  8. 49
  9. 38
  10. 194
  11. 56
  12. 46
  13. 23
  14. 182
  15. 71
  16. 68
  17. 86
  18. 32
  19. 188
  20. 39
  21. 66
  22. 62
  23. 31
  24. 51
  25. 156
  26. 19
  27. 154
  28. 124
  29. 17
  30. 24
  31. 74
  32. 122
  33. 112
  34. 76
  35. 59
  36. 192
  37. 22
  38. 74
  39. 178
  40. 81

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