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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 673 · 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 69 =
  2. 2.Double 64 =
  3. 3.Half of 68 =
  4. 4.Half of 122 =
  5. 5.Half of 72 =
  6. 6.Half of 118 =
  7. 7.Double 81 =
  8. 8.Double 77 =
  9. 9.Half of 148 =
  10. 10.Half of 82 =
  11. 11.Double 19 =
  12. 12.Double 76 =
  13. 13.Half of 48 =
  14. 14.Double 94 =
  15. 15.Half of 152 =
  16. 16.Double 97 =
  17. 17.Double 36 =
  18. 18.Double 18 =
  19. 19.Half of 142 =
  20. 20.Double 35 =
  21. 21.Double 41 =
  22. 22.Half of 126 =
  23. 23.Half of 138 =
  24. 24.Half of 84 =
  25. 25.Double 85 =
  26. 26.Half of 144 =
  27. 27.Double 71 =
  28. 28.Double 57 =
  29. 29.Half of 76 =
  30. 30.Half of 198 =
  31. 31.Half of 172 =
  32. 32.Half of 28 =
  33. 33.Half of 98 =
  34. 34.Double 72 =
  35. 35.Double 98 =
  36. 36.Double 34 =
  37. 37.Double 93 =
  38. 38.Half of 62 =
  39. 39.Double 48 =
  40. 40.Double 27 =

Answer key

  1. 138
  2. 128
  3. 34
  4. 61
  5. 36
  6. 59
  7. 162
  8. 154
  9. 74
  10. 41
  11. 38
  12. 152
  13. 24
  14. 188
  15. 76
  16. 194
  17. 72
  18. 36
  19. 71
  20. 70
  21. 82
  22. 63
  23. 69
  24. 42
  25. 170
  26. 72
  27. 142
  28. 114
  29. 38
  30. 99
  31. 86
  32. 14
  33. 49
  34. 144
  35. 196
  36. 68
  37. 186
  38. 31
  39. 96
  40. 54

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