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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 679 · 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 182 =
  2. 2.Half of 42 =
  3. 3.Double 84 =
  4. 4.Half of 64 =
  5. 5.Double 42 =
  6. 6.Double 31 =
  7. 7.Double 35 =
  8. 8.Half of 114 =
  9. 9.Half of 138 =
  10. 10.Half of 176 =
  11. 11.Half of 164 =
  12. 12.Half of 116 =
  13. 13.Double 72 =
  14. 14.Half of 148 =
  15. 15.Double 86 =
  16. 16.Half of 166 =
  17. 17.Double 69 =
  18. 18.Half of 82 =
  19. 19.Double 93 =
  20. 20.Half of 168 =
  21. 21.Double 49 =
  22. 22.Double 85 =
  23. 23.Half of 178 =
  24. 24.Double 33 =
  25. 25.Double 41 =
  26. 26.Double 51 =
  27. 27.Half of 52 =
  28. 28.Half of 18 =
  29. 29.Double 92 =
  30. 30.Double 67 =
  31. 31.Double 23 =
  32. 32.Half of 32 =
  33. 33.Double 63 =
  34. 34.Half of 88 =
  35. 35.Half of 12 =
  36. 36.Half of 142 =
  37. 37.Double 62 =
  38. 38.Half of 124 =
  39. 39.Double 68 =
  40. 40.Double 32 =

Answer key

  1. 91
  2. 21
  3. 168
  4. 32
  5. 84
  6. 62
  7. 70
  8. 57
  9. 69
  10. 88
  11. 82
  12. 58
  13. 144
  14. 74
  15. 172
  16. 83
  17. 138
  18. 41
  19. 186
  20. 84
  21. 98
  22. 170
  23. 89
  24. 66
  25. 82
  26. 102
  27. 26
  28. 9
  29. 184
  30. 134
  31. 46
  32. 16
  33. 126
  34. 44
  35. 6
  36. 71
  37. 124
  38. 62
  39. 136
  40. 64

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