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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 382 · 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 136 =
  2. 2.Double 48 =
  3. 3.Half of 112 =
  4. 4.Double 89 =
  5. 5.Double 29 =
  6. 6.Half of 144 =
  7. 7.Double 96 =
  8. 8.Double 67 =
  9. 9.Half of 122 =
  10. 10.Half of 52 =
  11. 11.Half of 32 =
  12. 12.Half of 132 =
  13. 13.Double 52 =
  14. 14.Double 13 =
  15. 15.Double 71 =
  16. 16.Half of 46 =
  17. 17.Double 95 =
  18. 18.Half of 192 =
  19. 19.Double 73 =
  20. 20.Double 23 =
  21. 21.Half of 42 =
  22. 22.Double 27 =
  23. 23.Double 51 =
  24. 24.Double 24 =
  25. 25.Half of 188 =
  26. 26.Half of 106 =
  27. 27.Half of 116 =
  28. 28.Half of 196 =
  29. 29.Double 28 =
  30. 30.Double 81 =
  31. 31.Half of 176 =
  32. 32.Double 54 =
  33. 33.Double 18 =
  34. 34.Half of 34 =
  35. 35.Double 57 =
  36. 36.Double 88 =
  37. 37.Double 33 =
  38. 38.Double 85 =
  39. 39.Half of 26 =
  40. 40.Double 45 =

Answer key

  1. 68
  2. 96
  3. 56
  4. 178
  5. 58
  6. 72
  7. 192
  8. 134
  9. 61
  10. 26
  11. 16
  12. 66
  13. 104
  14. 26
  15. 142
  16. 23
  17. 190
  18. 96
  19. 146
  20. 46
  21. 21
  22. 54
  23. 102
  24. 48
  25. 94
  26. 53
  27. 58
  28. 98
  29. 56
  30. 162
  31. 88
  32. 108
  33. 36
  34. 17
  35. 114
  36. 176
  37. 66
  38. 170
  39. 13
  40. 90

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