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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 394 · 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 78 =
  2. 2.Double 33 =
  3. 3.Half of 76 =
  4. 4.Double 88 =
  5. 5.Double 17 =
  6. 6.Half of 138 =
  7. 7.Double 68 =
  8. 8.Double 86 =
  9. 9.Half of 92 =
  10. 10.Half of 22 =
  11. 11.Double 34 =
  12. 12.Double 46 =
  13. 13.Half of 52 =
  14. 14.Half of 102 =
  15. 15.Half of 112 =
  16. 16.Double 44 =
  17. 17.Double 26 =
  18. 18.Double 18 =
  19. 19.Half of 194 =
  20. 20.Half of 16 =
  21. 21.Half of 166 =
  22. 22.Double 32 =
  23. 23.Double 92 =
  24. 24.Double 24 =
  25. 25.Double 41 =
  26. 26.Half of 18 =
  27. 27.Half of 122 =
  28. 28.Half of 38 =
  29. 29.Half of 108 =
  30. 30.Half of 72 =
  31. 31.Half of 152 =
  32. 32.Double 91 =
  33. 33.Double 42 =
  34. 34.Double 98 =
  35. 35.Double 61 =
  36. 36.Half of 178 =
  37. 37.Double 99 =
  38. 38.Half of 66 =
  39. 39.Double 76 =
  40. 40.Double 75 =

Answer key

  1. 156
  2. 66
  3. 38
  4. 176
  5. 34
  6. 69
  7. 136
  8. 172
  9. 46
  10. 11
  11. 68
  12. 92
  13. 26
  14. 51
  15. 56
  16. 88
  17. 52
  18. 36
  19. 97
  20. 8
  21. 83
  22. 64
  23. 184
  24. 48
  25. 82
  26. 9
  27. 61
  28. 19
  29. 54
  30. 36
  31. 76
  32. 182
  33. 84
  34. 196
  35. 122
  36. 89
  37. 198
  38. 33
  39. 152
  40. 150

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