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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 398 · 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 162 =
  2. 2.Double 81 =
  3. 3.Double 34 =
  4. 4.Double 38 =
  5. 5.Double 98 =
  6. 6.Double 31 =
  7. 7.Double 33 =
  8. 8.Half of 152 =
  9. 9.Double 91 =
  10. 10.Half of 102 =
  11. 11.Double 24 =
  12. 12.Double 69 =
  13. 13.Double 51 =
  14. 14.Double 52 =
  15. 15.Double 67 =
  16. 16.Half of 62 =
  17. 17.Half of 186 =
  18. 18.Double 71 =
  19. 19.Half of 138 =
  20. 20.Double 44 =
  21. 21.Half of 198 =
  22. 22.Double 11 =
  23. 23.Double 45 =
  24. 24.Double 22 =
  25. 25.Double 57 =
  26. 26.Double 63 =
  27. 27.Half of 148 =
  28. 28.Half of 92 =
  29. 29.Double 46 =
  30. 30.Half of 182 =
  31. 31.Half of 64 =
  32. 32.Double 58 =
  33. 33.Double 61 =
  34. 34.Double 41 =
  35. 35.Half of 132 =
  36. 36.Double 19 =
  37. 37.Double 15 =
  38. 38.Half of 58 =
  39. 39.Double 95 =
  40. 40.Double 85 =

Answer key

  1. 81
  2. 162
  3. 68
  4. 76
  5. 196
  6. 62
  7. 66
  8. 76
  9. 182
  10. 51
  11. 48
  12. 138
  13. 102
  14. 104
  15. 134
  16. 31
  17. 93
  18. 142
  19. 69
  20. 88
  21. 99
  22. 22
  23. 90
  24. 44
  25. 114
  26. 126
  27. 74
  28. 46
  29. 92
  30. 91
  31. 32
  32. 116
  33. 122
  34. 82
  35. 66
  36. 38
  37. 30
  38. 29
  39. 190
  40. 170

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