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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 389 · 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 166 =
  2. 2.Half of 42 =
  3. 3.Double 68 =
  4. 4.Double 32 =
  5. 5.Double 95 =
  6. 6.Half of 172 =
  7. 7.Double 93 =
  8. 8.Double 66 =
  9. 9.Half of 154 =
  10. 10.Double 37 =
  11. 11.Double 79 =
  12. 12.Double 14 =
  13. 13.Half of 52 =
  14. 14.Double 38 =
  15. 15.Double 87 =
  16. 16.Half of 32 =
  17. 17.Half of 26 =
  18. 18.Half of 108 =
  19. 19.Double 45 =
  20. 20.Half of 148 =
  21. 21.Half of 142 =
  22. 22.Half of 46 =
  23. 23.Double 65 =
  24. 24.Half of 92 =
  25. 25.Double 36 =
  26. 26.Half of 94 =
  27. 27.Half of 62 =
  28. 28.Double 43 =
  29. 29.Double 47 =
  30. 30.Double 22 =
  31. 31.Double 51 =
  32. 32.Double 91 =
  33. 33.Half of 16 =
  34. 34.Half of 66 =
  35. 35.Half of 72 =
  36. 36.Double 74 =
  37. 37.Half of 144 =
  38. 38.Half of 192 =
  39. 39.Half of 96 =
  40. 40.Double 23 =

Answer key

  1. 83
  2. 21
  3. 136
  4. 64
  5. 190
  6. 86
  7. 186
  8. 132
  9. 77
  10. 74
  11. 158
  12. 28
  13. 26
  14. 76
  15. 174
  16. 16
  17. 13
  18. 54
  19. 90
  20. 74
  21. 71
  22. 23
  23. 130
  24. 46
  25. 72
  26. 47
  27. 31
  28. 86
  29. 94
  30. 44
  31. 102
  32. 182
  33. 8
  34. 33
  35. 36
  36. 148
  37. 72
  38. 96
  39. 48
  40. 46

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