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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 609 · 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 172 =
  2. 2.Half of 198 =
  3. 3.Double 84 =
  4. 4.Double 96 =
  5. 5.Half of 192 =
  6. 6.Half of 68 =
  7. 7.Double 99 =
  8. 8.Double 88 =
  9. 9.Double 22 =
  10. 10.Double 39 =
  11. 11.Double 92 =
  12. 12.Double 93 =
  13. 13.Double 34 =
  14. 14.Half of 82 =
  15. 15.Double 24 =
  16. 16.Half of 48 =
  17. 17.Double 31 =
  18. 18.Half of 42 =
  19. 19.Double 37 =
  20. 20.Half of 156 =
  21. 21.Double 16 =
  22. 22.Half of 118 =
  23. 23.Half of 28 =
  24. 24.Half of 46 =
  25. 25.Half of 18 =
  26. 26.Double 58 =
  27. 27.Double 33 =
  28. 28.Half of 104 =
  29. 29.Double 48 =
  30. 30.Half of 112 =
  31. 31.Double 27 =
  32. 32.Half of 92 =
  33. 33.Half of 94 =
  34. 34.Double 69 =
  35. 35.Half of 102 =
  36. 36.Double 36 =
  37. 37.Half of 176 =
  38. 38.Half of 142 =
  39. 39.Half of 52 =
  40. 40.Double 87 =

Answer key

  1. 86
  2. 99
  3. 168
  4. 192
  5. 96
  6. 34
  7. 198
  8. 176
  9. 44
  10. 78
  11. 184
  12. 186
  13. 68
  14. 41
  15. 48
  16. 24
  17. 62
  18. 21
  19. 74
  20. 78
  21. 32
  22. 59
  23. 14
  24. 23
  25. 9
  26. 116
  27. 66
  28. 52
  29. 96
  30. 56
  31. 54
  32. 46
  33. 47
  34. 138
  35. 51
  36. 72
  37. 88
  38. 71
  39. 26
  40. 174

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