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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 167 · 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 146 =
  2. 2.Half of 172 =
  3. 3.Double 67 =
  4. 4.Double 66 =
  5. 5.Double 57 =
  6. 6.Half of 32 =
  7. 7.Double 33 =
  8. 8.Double 91 =
  9. 9.Double 35 =
  10. 10.Half of 24 =
  11. 11.Double 38 =
  12. 12.Double 28 =
  13. 13.Half of 66 =
  14. 14.Half of 194 =
  15. 15.Half of 138 =
  16. 16.Double 15 =
  17. 17.Double 37 =
  18. 18.Double 17 =
  19. 19.Half of 156 =
  20. 20.Double 92 =
  21. 21.Double 13 =
  22. 22.Double 29 =
  23. 23.Half of 198 =
  24. 24.Half of 154 =
  25. 25.Double 31 =
  26. 26.Half of 162 =
  27. 27.Half of 86 =
  28. 28.Double 95 =
  29. 29.Double 24 =
  30. 30.Half of 192 =
  31. 31.Double 19 =
  32. 32.Half of 96 =
  33. 33.Half of 166 =
  34. 34.Half of 108 =
  35. 35.Half of 18 =
  36. 36.Half of 84 =
  37. 37.Half of 104 =
  38. 38.Double 69 =
  39. 39.Double 72 =
  40. 40.Double 46 =

Answer key

  1. 73
  2. 86
  3. 134
  4. 132
  5. 114
  6. 16
  7. 66
  8. 182
  9. 70
  10. 12
  11. 76
  12. 56
  13. 33
  14. 97
  15. 69
  16. 30
  17. 74
  18. 34
  19. 78
  20. 184
  21. 26
  22. 58
  23. 99
  24. 77
  25. 62
  26. 81
  27. 43
  28. 190
  29. 48
  30. 96
  31. 38
  32. 48
  33. 83
  34. 54
  35. 9
  36. 42
  37. 52
  38. 138
  39. 144
  40. 92

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