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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 91 · 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 87 =
  2. 2.Half of 52 =
  3. 3.Double 52 =
  4. 4.Double 54 =
  5. 5.Double 34 =
  6. 6.Half of 174 =
  7. 7.Double 46 =
  8. 8.Half of 152 =
  9. 9.Double 21 =
  10. 10.Double 75 =
  11. 11.Double 81 =
  12. 12.Double 95 =
  13. 13.Double 32 =
  14. 14.Double 23 =
  15. 15.Double 93 =
  16. 16.Half of 168 =
  17. 17.Half of 42 =
  18. 18.Double 24 =
  19. 19.Double 43 =
  20. 20.Half of 146 =
  21. 21.Double 55 =
  22. 22.Double 41 =
  23. 23.Double 15 =
  24. 24.Double 71 =
  25. 25.Double 98 =
  26. 26.Half of 176 =
  27. 27.Double 51 =
  28. 28.Half of 108 =
  29. 29.Half of 126 =
  30. 30.Double 67 =
  31. 31.Double 44 =
  32. 32.Double 37 =
  33. 33.Double 19 =
  34. 34.Half of 136 =
  35. 35.Half of 26 =
  36. 36.Double 99 =
  37. 37.Double 68 =
  38. 38.Half of 94 =
  39. 39.Double 29 =
  40. 40.Half of 182 =

Answer key

  1. 174
  2. 26
  3. 104
  4. 108
  5. 68
  6. 87
  7. 92
  8. 76
  9. 42
  10. 150
  11. 162
  12. 190
  13. 64
  14. 46
  15. 186
  16. 84
  17. 21
  18. 48
  19. 86
  20. 73
  21. 110
  22. 82
  23. 30
  24. 142
  25. 196
  26. 88
  27. 102
  28. 54
  29. 63
  30. 134
  31. 88
  32. 74
  33. 38
  34. 68
  35. 13
  36. 198
  37. 136
  38. 47
  39. 58
  40. 91

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