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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 338 · 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 95 =
  2. 2.Double 52 =
  3. 3.Double 62 =
  4. 4.Half of 102 =
  5. 5.Double 66 =
  6. 6.Double 17 =
  7. 7.Double 65 =
  8. 8.Half of 146 =
  9. 9.Half of 174 =
  10. 10.Half of 132 =
  11. 11.Half of 38 =
  12. 12.Double 61 =
  13. 13.Half of 22 =
  14. 14.Double 78 =
  15. 15.Double 69 =
  16. 16.Half of 58 =
  17. 17.Double 19 =
  18. 18.Double 27 =
  19. 19.Half of 136 =
  20. 20.Double 71 =
  21. 21.Half of 52 =
  22. 22.Double 34 =
  23. 23.Double 45 =
  24. 24.Double 51 =
  25. 25.Half of 116 =
  26. 26.Half of 76 =
  27. 27.Half of 172 =
  28. 28.Double 98 =
  29. 29.Half of 12 =
  30. 30.Double 74 =
  31. 31.Double 42 =
  32. 32.Double 73 =
  33. 33.Half of 188 =
  34. 34.Double 24 =
  35. 35.Double 48 =
  36. 36.Half of 92 =
  37. 37.Double 32 =
  38. 38.Half of 148 =
  39. 39.Double 39 =
  40. 40.Double 63 =

Answer key

  1. 190
  2. 104
  3. 124
  4. 51
  5. 132
  6. 34
  7. 130
  8. 73
  9. 87
  10. 66
  11. 19
  12. 122
  13. 11
  14. 156
  15. 138
  16. 29
  17. 38
  18. 54
  19. 68
  20. 142
  21. 26
  22. 68
  23. 90
  24. 102
  25. 58
  26. 38
  27. 86
  28. 196
  29. 6
  30. 148
  31. 84
  32. 146
  33. 94
  34. 48
  35. 96
  36. 46
  37. 64
  38. 74
  39. 78
  40. 126

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