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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 204 · 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 71 =
  2. 2.Half of 172 =
  3. 3.Half of 148 =
  4. 4.Half of 198 =
  5. 5.Half of 98 =
  6. 6.Double 67 =
  7. 7.Double 49 =
  8. 8.Half of 44 =
  9. 9.Double 66 =
  10. 10.Half of 88 =
  11. 11.Double 73 =
  12. 12.Double 81 =
  13. 13.Half of 24 =
  14. 14.Half of 142 =
  15. 15.Half of 62 =
  16. 16.Double 95 =
  17. 17.Double 31 =
  18. 18.Double 74 =
  19. 19.Half of 52 =
  20. 20.Half of 26 =
  21. 21.Double 32 =
  22. 22.Half of 192 =
  23. 23.Half of 78 =
  24. 24.Half of 168 =
  25. 25.Double 27 =
  26. 26.Half of 122 =
  27. 27.Half of 132 =
  28. 28.Double 44 =
  29. 29.Double 87 =
  30. 30.Double 78 =
  31. 31.Double 48 =
  32. 32.Half of 194 =
  33. 33.Half of 102 =
  34. 34.Double 34 =
  35. 35.Half of 42 =
  36. 36.Half of 112 =
  37. 37.Double 58 =
  38. 38.Half of 34 =
  39. 39.Double 45 =
  40. 40.Double 35 =

Answer key

  1. 142
  2. 86
  3. 74
  4. 99
  5. 49
  6. 134
  7. 98
  8. 22
  9. 132
  10. 44
  11. 146
  12. 162
  13. 12
  14. 71
  15. 31
  16. 190
  17. 62
  18. 148
  19. 26
  20. 13
  21. 64
  22. 96
  23. 39
  24. 84
  25. 54
  26. 61
  27. 66
  28. 88
  29. 174
  30. 156
  31. 96
  32. 97
  33. 51
  34. 68
  35. 21
  36. 56
  37. 116
  38. 17
  39. 90
  40. 70

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