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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 613 · 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 14 =
  2. 2.Half of 184 =
  3. 3.Half of 102 =
  4. 4.Half of 42 =
  5. 5.Double 55 =
  6. 6.Double 57 =
  7. 7.Half of 36 =
  8. 8.Double 39 =
  9. 9.Double 22 =
  10. 10.Half of 118 =
  11. 11.Double 15 =
  12. 12.Half of 136 =
  13. 13.Half of 18 =
  14. 14.Double 24 =
  15. 15.Double 42 =
  16. 16.Double 13 =
  17. 17.Double 89 =
  18. 18.Half of 148 =
  19. 19.Half of 164 =
  20. 20.Double 38 =
  21. 21.Double 74 =
  22. 22.Half of 196 =
  23. 23.Double 65 =
  24. 24.Double 79 =
  25. 25.Half of 194 =
  26. 26.Half of 126 =
  27. 27.Double 99 =
  28. 28.Half of 134 =
  29. 29.Half of 132 =
  30. 30.Half of 12 =
  31. 31.Double 86 =
  32. 32.Half of 138 =
  33. 33.Half of 84 =
  34. 34.Double 88 =
  35. 35.Double 17 =
  36. 36.Double 21 =
  37. 37.Double 75 =
  38. 38.Double 31 =
  39. 39.Double 91 =
  40. 40.Double 33 =

Answer key

  1. 28
  2. 92
  3. 51
  4. 21
  5. 110
  6. 114
  7. 18
  8. 78
  9. 44
  10. 59
  11. 30
  12. 68
  13. 9
  14. 48
  15. 84
  16. 26
  17. 178
  18. 74
  19. 82
  20. 76
  21. 148
  22. 98
  23. 130
  24. 158
  25. 97
  26. 63
  27. 198
  28. 67
  29. 66
  30. 6
  31. 172
  32. 69
  33. 42
  34. 176
  35. 34
  36. 42
  37. 150
  38. 62
  39. 182
  40. 66

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