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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 78 · 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 73 =
  2. 2.Double 75 =
  3. 3.Half of 162 =
  4. 4.Double 22 =
  5. 5.Half of 66 =
  6. 6.Half of 94 =
  7. 7.Half of 122 =
  8. 8.Double 31 =
  9. 9.Half of 152 =
  10. 10.Double 81 =
  11. 11.Half of 62 =
  12. 12.Double 63 =
  13. 13.Half of 164 =
  14. 14.Double 57 =
  15. 15.Half of 96 =
  16. 16.Half of 38 =
  17. 17.Double 96 =
  18. 18.Double 66 =
  19. 19.Double 12 =
  20. 20.Double 99 =
  21. 21.Half of 64 =
  22. 22.Double 74 =
  23. 23.Double 15 =
  24. 24.Half of 48 =
  25. 25.Half of 44 =
  26. 26.Double 18 =
  27. 27.Double 53 =
  28. 28.Double 42 =
  29. 29.Half of 12 =
  30. 30.Half of 56 =
  31. 31.Double 58 =
  32. 32.Double 78 =
  33. 33.Half of 58 =
  34. 34.Double 71 =
  35. 35.Double 61 =
  36. 36.Half of 52 =
  37. 37.Double 21 =
  38. 38.Half of 82 =
  39. 39.Double 69 =
  40. 40.Double 98 =

Answer key

  1. 146
  2. 150
  3. 81
  4. 44
  5. 33
  6. 47
  7. 61
  8. 62
  9. 76
  10. 162
  11. 31
  12. 126
  13. 82
  14. 114
  15. 48
  16. 19
  17. 192
  18. 132
  19. 24
  20. 198
  21. 32
  22. 148
  23. 30
  24. 24
  25. 22
  26. 36
  27. 106
  28. 84
  29. 6
  30. 28
  31. 116
  32. 156
  33. 29
  34. 142
  35. 122
  36. 26
  37. 42
  38. 41
  39. 138
  40. 196

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