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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 584 · 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 29 =
  2. 2.Half of 114 =
  3. 3.Double 49 =
  4. 4.Double 89 =
  5. 5.Double 67 =
  6. 6.Half of 196 =
  7. 7.Half of 118 =
  8. 8.Double 14 =
  9. 9.Half of 92 =
  10. 10.Half of 154 =
  11. 11.Double 15 =
  12. 12.Double 69 =
  13. 13.Half of 122 =
  14. 14.Double 48 =
  15. 15.Half of 52 =
  16. 16.Double 32 =
  17. 17.Half of 134 =
  18. 18.Half of 176 =
  19. 19.Half of 48 =
  20. 20.Half of 104 =
  21. 21.Half of 164 =
  22. 22.Double 76 =
  23. 23.Double 64 =
  24. 24.Half of 174 =
  25. 25.Half of 166 =
  26. 26.Double 51 =
  27. 27.Double 95 =
  28. 28.Double 58 =
  29. 29.Half of 62 =
  30. 30.Half of 144 =
  31. 31.Half of 142 =
  32. 32.Half of 102 =
  33. 33.Half of 36 =
  34. 34.Half of 14 =
  35. 35.Half of 82 =
  36. 36.Double 22 =
  37. 37.Half of 78 =
  38. 38.Double 98 =
  39. 39.Double 44 =
  40. 40.Double 21 =

Answer key

  1. 58
  2. 57
  3. 98
  4. 178
  5. 134
  6. 98
  7. 59
  8. 28
  9. 46
  10. 77
  11. 30
  12. 138
  13. 61
  14. 96
  15. 26
  16. 64
  17. 67
  18. 88
  19. 24
  20. 52
  21. 82
  22. 152
  23. 128
  24. 87
  25. 83
  26. 102
  27. 190
  28. 116
  29. 31
  30. 72
  31. 71
  32. 51
  33. 18
  34. 7
  35. 41
  36. 44
  37. 39
  38. 196
  39. 88
  40. 42

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