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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 695 · 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 136 =
  2. 2.Half of 24 =
  3. 3.Double 59 =
  4. 4.Double 14 =
  5. 5.Double 92 =
  6. 6.Half of 196 =
  7. 7.Double 69 =
  8. 8.Double 48 =
  9. 9.Half of 194 =
  10. 10.Double 99 =
  11. 11.Double 25 =
  12. 12.Half of 156 =
  13. 13.Double 26 =
  14. 14.Half of 172 =
  15. 15.Half of 128 =
  16. 16.Double 62 =
  17. 17.Double 41 =
  18. 18.Double 11 =
  19. 19.Double 86 =
  20. 20.Double 31 =
  21. 21.Double 81 =
  22. 22.Half of 158 =
  23. 23.Double 52 =
  24. 24.Half of 108 =
  25. 25.Double 28 =
  26. 26.Double 18 =
  27. 27.Half of 152 =
  28. 28.Half of 138 =
  29. 29.Double 77 =
  30. 30.Half of 52 =
  31. 31.Double 91 =
  32. 32.Half of 54 =
  33. 33.Double 42 =
  34. 34.Double 12 =
  35. 35.Double 66 =
  36. 36.Half of 14 =
  37. 37.Double 22 =
  38. 38.Double 21 =
  39. 39.Half of 72 =
  40. 40.Half of 124 =

Answer key

  1. 68
  2. 12
  3. 118
  4. 28
  5. 184
  6. 98
  7. 138
  8. 96
  9. 97
  10. 198
  11. 50
  12. 78
  13. 52
  14. 86
  15. 64
  16. 124
  17. 82
  18. 22
  19. 172
  20. 62
  21. 162
  22. 79
  23. 104
  24. 54
  25. 56
  26. 36
  27. 76
  28. 69
  29. 154
  30. 26
  31. 182
  32. 27
  33. 84
  34. 24
  35. 132
  36. 7
  37. 44
  38. 42
  39. 36
  40. 62

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