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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 740 · 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 14 =
  2. 2.Half of 124 =
  3. 3.Double 45 =
  4. 4.Double 59 =
  5. 5.Half of 114 =
  6. 6.Double 93 =
  7. 7.Double 91 =
  8. 8.Double 36 =
  9. 9.Double 74 =
  10. 10.Double 57 =
  11. 11.Double 83 =
  12. 12.Double 39 =
  13. 13.Half of 184 =
  14. 14.Double 21 =
  15. 15.Double 65 =
  16. 16.Double 13 =
  17. 17.Half of 158 =
  18. 18.Half of 118 =
  19. 19.Half of 192 =
  20. 20.Half of 178 =
  21. 21.Double 96 =
  22. 22.Double 98 =
  23. 23.Half of 52 =
  24. 24.Half of 16 =
  25. 25.Double 68 =
  26. 26.Half of 146 =
  27. 27.Half of 168 =
  28. 28.Double 54 =
  29. 29.Half of 62 =
  30. 30.Half of 82 =
  31. 31.Double 14 =
  32. 32.Double 33 =
  33. 33.Half of 88 =
  34. 34.Double 51 =
  35. 35.Double 15 =
  36. 36.Double 41 =
  37. 37.Double 86 =
  38. 38.Double 63 =
  39. 39.Double 85 =
  40. 40.Half of 136 =

Answer key

  1. 7
  2. 62
  3. 90
  4. 118
  5. 57
  6. 186
  7. 182
  8. 72
  9. 148
  10. 114
  11. 166
  12. 78
  13. 92
  14. 42
  15. 130
  16. 26
  17. 79
  18. 59
  19. 96
  20. 89
  21. 192
  22. 196
  23. 26
  24. 8
  25. 136
  26. 73
  27. 84
  28. 108
  29. 31
  30. 41
  31. 28
  32. 66
  33. 44
  34. 102
  35. 30
  36. 82
  37. 172
  38. 126
  39. 170
  40. 68

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