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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 139 · 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 61 =
  2. 2.Double 39 =
  3. 3.Half of 42 =
  4. 4.Half of 28 =
  5. 5.Half of 182 =
  6. 6.Double 34 =
  7. 7.Double 57 =
  8. 8.Double 11 =
  9. 9.Double 29 =
  10. 10.Double 16 =
  11. 11.Double 25 =
  12. 12.Double 78 =
  13. 13.Double 47 =
  14. 14.Half of 12 =
  15. 15.Double 32 =
  16. 16.Half of 92 =
  17. 17.Double 98 =
  18. 18.Double 86 =
  19. 19.Half of 142 =
  20. 20.Double 67 =
  21. 21.Half of 186 =
  22. 22.Half of 64 =
  23. 23.Half of 72 =
  24. 24.Double 46 =
  25. 25.Half of 36 =
  26. 26.Double 66 =
  27. 27.Double 54 =
  28. 28.Double 45 =
  29. 29.Double 26 =
  30. 30.Double 69 =
  31. 31.Half of 132 =
  32. 32.Half of 26 =
  33. 33.Double 75 =
  34. 34.Half of 162 =
  35. 35.Half of 198 =
  36. 36.Double 97 =
  37. 37.Half of 172 =
  38. 38.Double 92 =
  39. 39.Double 27 =
  40. 40.Double 72 =

Answer key

  1. 122
  2. 78
  3. 21
  4. 14
  5. 91
  6. 68
  7. 114
  8. 22
  9. 58
  10. 32
  11. 50
  12. 156
  13. 94
  14. 6
  15. 64
  16. 46
  17. 196
  18. 172
  19. 71
  20. 134
  21. 93
  22. 32
  23. 36
  24. 92
  25. 18
  26. 132
  27. 108
  28. 90
  29. 52
  30. 138
  31. 66
  32. 13
  33. 150
  34. 81
  35. 99
  36. 194
  37. 86
  38. 184
  39. 54
  40. 144

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