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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 5 · 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 76 =
  2. 2.Double 92 =
  3. 3.Double 45 =
  4. 4.Half of 126 =
  5. 5.Double 68 =
  6. 6.Double 93 =
  7. 7.Half of 46 =
  8. 8.Double 98 =
  9. 9.Double 78 =
  10. 10.Double 31 =
  11. 11.Double 61 =
  12. 12.Double 13 =
  13. 13.Double 21 =
  14. 14.Half of 182 =
  15. 15.Double 58 =
  16. 16.Half of 58 =
  17. 17.Double 51 =
  18. 18.Double 15 =
  19. 19.Double 99 =
  20. 20.Double 43 =
  21. 21.Double 44 =
  22. 22.Double 62 =
  23. 23.Half of 54 =
  24. 24.Half of 146 =
  25. 25.Double 41 =
  26. 26.Double 83 =
  27. 27.Double 82 =
  28. 28.Half of 106 =
  29. 29.Double 24 =
  30. 30.Half of 14 =
  31. 31.Double 77 =
  32. 32.Half of 48 =
  33. 33.Double 11 =
  34. 34.Double 18 =
  35. 35.Half of 22 =
  36. 36.Half of 128 =
  37. 37.Half of 102 =
  38. 38.Double 94 =
  39. 39.Half of 132 =
  40. 40.Double 79 =

Answer key

  1. 38
  2. 184
  3. 90
  4. 63
  5. 136
  6. 186
  7. 23
  8. 196
  9. 156
  10. 62
  11. 122
  12. 26
  13. 42
  14. 91
  15. 116
  16. 29
  17. 102
  18. 30
  19. 198
  20. 86
  21. 88
  22. 124
  23. 27
  24. 73
  25. 82
  26. 166
  27. 164
  28. 53
  29. 48
  30. 7
  31. 154
  32. 24
  33. 22
  34. 36
  35. 11
  36. 64
  37. 51
  38. 188
  39. 66
  40. 158

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