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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 256 · 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 91 =
  2. 2.Double 35 =
  3. 3.Double 95 =
  4. 4.Double 48 =
  5. 5.Double 46 =
  6. 6.Half of 174 =
  7. 7.Double 27 =
  8. 8.Half of 138 =
  9. 9.Half of 142 =
  10. 10.Half of 148 =
  11. 11.Double 75 =
  12. 12.Double 15 =
  13. 13.Half of 28 =
  14. 14.Double 14 =
  15. 15.Half of 172 =
  16. 16.Double 52 =
  17. 17.Double 51 =
  18. 18.Double 31 =
  19. 19.Half of 72 =
  20. 20.Half of 52 =
  21. 21.Half of 108 =
  22. 22.Half of 82 =
  23. 23.Double 66 =
  24. 24.Double 83 =
  25. 25.Double 92 =
  26. 26.Double 96 =
  27. 27.Half of 176 =
  28. 28.Half of 22 =
  29. 29.Half of 152 =
  30. 30.Half of 86 =
  31. 31.Double 89 =
  32. 32.Half of 94 =
  33. 33.Half of 62 =
  34. 34.Double 43 =
  35. 35.Half of 34 =
  36. 36.Half of 96 =
  37. 37.Double 11 =
  38. 38.Half of 16 =
  39. 39.Double 44 =
  40. 40.Half of 188 =

Answer key

  1. 182
  2. 70
  3. 190
  4. 96
  5. 92
  6. 87
  7. 54
  8. 69
  9. 71
  10. 74
  11. 150
  12. 30
  13. 14
  14. 28
  15. 86
  16. 104
  17. 102
  18. 62
  19. 36
  20. 26
  21. 54
  22. 41
  23. 132
  24. 166
  25. 184
  26. 192
  27. 88
  28. 11
  29. 76
  30. 43
  31. 178
  32. 47
  33. 31
  34. 86
  35. 17
  36. 48
  37. 22
  38. 8
  39. 88
  40. 94

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