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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 155 · 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 13 =
  2. 2.Double 67 =
  3. 3.Half of 188 =
  4. 4.Double 79 =
  5. 5.Double 93 =
  6. 6.Half of 152 =
  7. 7.Half of 42 =
  8. 8.Double 61 =
  9. 9.Double 17 =
  10. 10.Double 26 =
  11. 11.Double 81 =
  12. 12.Half of 104 =
  13. 13.Double 15 =
  14. 14.Double 62 =
  15. 15.Half of 114 =
  16. 16.Double 85 =
  17. 17.Double 25 =
  18. 18.Half of 108 =
  19. 19.Double 37 =
  20. 20.Half of 174 =
  21. 21.Half of 102 =
  22. 22.Double 75 =
  23. 23.Double 19 =
  24. 24.Half of 128 =
  25. 25.Half of 196 =
  26. 26.Double 63 =
  27. 27.Double 32 =
  28. 28.Double 51 =
  29. 29.Double 55 =
  30. 30.Double 41 =
  31. 31.Double 72 =
  32. 32.Double 76 =
  33. 33.Half of 34 =
  34. 34.Half of 172 =
  35. 35.Double 64 =
  36. 36.Double 89 =
  37. 37.Half of 126 =
  38. 38.Double 34 =
  39. 39.Half of 18 =
  40. 40.Half of 62 =

Answer key

  1. 26
  2. 134
  3. 94
  4. 158
  5. 186
  6. 76
  7. 21
  8. 122
  9. 34
  10. 52
  11. 162
  12. 52
  13. 30
  14. 124
  15. 57
  16. 170
  17. 50
  18. 54
  19. 74
  20. 87
  21. 51
  22. 150
  23. 38
  24. 64
  25. 98
  26. 126
  27. 64
  28. 102
  29. 110
  30. 82
  31. 144
  32. 152
  33. 17
  34. 86
  35. 128
  36. 178
  37. 63
  38. 68
  39. 9
  40. 31

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