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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 100 · 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 24 =
  2. 2.Half of 172 =
  3. 3.Half of 124 =
  4. 4.Double 47 =
  5. 5.Double 19 =
  6. 6.Double 81 =
  7. 7.Double 35 =
  8. 8.Double 64 =
  9. 9.Double 96 =
  10. 10.Half of 48 =
  11. 11.Double 48 =
  12. 12.Double 94 =
  13. 13.Double 93 =
  14. 14.Double 31 =
  15. 15.Half of 26 =
  16. 16.Double 28 =
  17. 17.Half of 116 =
  18. 18.Half of 182 =
  19. 19.Double 12 =
  20. 20.Half of 64 =
  21. 21.Half of 92 =
  22. 22.Half of 24 =
  23. 23.Double 42 =
  24. 24.Half of 32 =
  25. 25.Half of 72 =
  26. 26.Half of 96 =
  27. 27.Half of 144 =
  28. 28.Double 49 =
  29. 29.Double 91 =
  30. 30.Double 14 =
  31. 31.Half of 58 =
  32. 32.Double 97 =
  33. 33.Half of 52 =
  34. 34.Half of 74 =
  35. 35.Half of 122 =
  36. 36.Double 37 =
  37. 37.Double 23 =
  38. 38.Double 44 =
  39. 39.Double 72 =
  40. 40.Half of 22 =

Answer key

  1. 48
  2. 86
  3. 62
  4. 94
  5. 38
  6. 162
  7. 70
  8. 128
  9. 192
  10. 24
  11. 96
  12. 188
  13. 186
  14. 62
  15. 13
  16. 56
  17. 58
  18. 91
  19. 24
  20. 32
  21. 46
  22. 12
  23. 84
  24. 16
  25. 36
  26. 48
  27. 72
  28. 98
  29. 182
  30. 28
  31. 29
  32. 194
  33. 26
  34. 37
  35. 61
  36. 74
  37. 46
  38. 88
  39. 144
  40. 11

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