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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 13 · 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 55 =
  3. 3.Double 75 =
  4. 4.Half of 134 =
  5. 5.Half of 82 =
  6. 6.Double 79 =
  7. 7.Double 78 =
  8. 8.Half of 112 =
  9. 9.Double 88 =
  10. 10.Half of 44 =
  11. 11.Half of 198 =
  12. 12.Half of 196 =
  13. 13.Double 43 =
  14. 14.Half of 144 =
  15. 15.Double 42 =
  16. 16.Half of 34 =
  17. 17.Half of 102 =
  18. 18.Double 56 =
  19. 19.Double 34 =
  20. 20.Half of 66 =
  21. 21.Double 26 =
  22. 22.Double 29 =
  23. 23.Double 95 =
  24. 24.Double 59 =
  25. 25.Double 45 =
  26. 26.Half of 92 =
  27. 27.Double 61 =
  28. 28.Double 33 =
  29. 29.Double 81 =
  30. 30.Half of 172 =
  31. 31.Double 41 =
  32. 32.Double 21 =
  33. 33.Half of 32 =
  34. 34.Half of 48 =
  35. 35.Half of 188 =
  36. 36.Double 86 =
  37. 37.Double 49 =
  38. 38.Double 83 =
  39. 39.Double 28 =
  40. 40.Half of 18 =

Answer key

  1. 146
  2. 110
  3. 150
  4. 67
  5. 41
  6. 158
  7. 156
  8. 56
  9. 176
  10. 22
  11. 99
  12. 98
  13. 86
  14. 72
  15. 84
  16. 17
  17. 51
  18. 112
  19. 68
  20. 33
  21. 52
  22. 58
  23. 190
  24. 118
  25. 90
  26. 46
  27. 122
  28. 66
  29. 162
  30. 86
  31. 82
  32. 42
  33. 16
  34. 24
  35. 94
  36. 172
  37. 98
  38. 166
  39. 56
  40. 9

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