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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 297 · 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 38 =
  2. 2.Half of 92 =
  3. 3.Double 48 =
  4. 4.Half of 42 =
  5. 5.Half of 84 =
  6. 6.Half of 104 =
  7. 7.Half of 118 =
  8. 8.Double 78 =
  9. 9.Double 88 =
  10. 10.Double 75 =
  11. 11.Double 33 =
  12. 12.Double 46 =
  13. 13.Double 31 =
  14. 14.Double 63 =
  15. 15.Double 18 =
  16. 16.Double 71 =
  17. 17.Half of 168 =
  18. 18.Half of 38 =
  19. 19.Double 85 =
  20. 20.Half of 82 =
  21. 21.Half of 184 =
  22. 22.Double 73 =
  23. 23.Double 52 =
  24. 24.Double 25 =
  25. 25.Double 41 =
  26. 26.Half of 52 =
  27. 27.Double 97 =
  28. 28.Half of 154 =
  29. 29.Double 62 =
  30. 30.Double 27 =
  31. 31.Double 35 =
  32. 32.Double 55 =
  33. 33.Half of 16 =
  34. 34.Double 56 =
  35. 35.Half of 148 =
  36. 36.Double 91 =
  37. 37.Half of 36 =
  38. 38.Double 12 =
  39. 39.Double 58 =
  40. 40.Half of 186 =

Answer key

  1. 76
  2. 46
  3. 96
  4. 21
  5. 42
  6. 52
  7. 59
  8. 156
  9. 176
  10. 150
  11. 66
  12. 92
  13. 62
  14. 126
  15. 36
  16. 142
  17. 84
  18. 19
  19. 170
  20. 41
  21. 92
  22. 146
  23. 104
  24. 50
  25. 82
  26. 26
  27. 194
  28. 77
  29. 124
  30. 54
  31. 70
  32. 110
  33. 8
  34. 112
  35. 74
  36. 182
  37. 18
  38. 24
  39. 116
  40. 93

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