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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 795 · 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 72 =
  2. 2.Double 62 =
  3. 3.Double 64 =
  4. 4.Half of 18 =
  5. 5.Double 81 =
  6. 6.Double 21 =
  7. 7.Double 84 =
  8. 8.Double 63 =
  9. 9.Half of 78 =
  10. 10.Double 53 =
  11. 11.Double 36 =
  12. 12.Double 95 =
  13. 13.Half of 98 =
  14. 14.Double 85 =
  15. 15.Half of 38 =
  16. 16.Double 75 =
  17. 17.Double 18 =
  18. 18.Double 61 =
  19. 19.Double 13 =
  20. 20.Half of 192 =
  21. 21.Double 66 =
  22. 22.Half of 164 =
  23. 23.Double 94 =
  24. 24.Half of 152 =
  25. 25.Double 77 =
  26. 26.Double 11 =
  27. 27.Double 98 =
  28. 28.Half of 182 =
  29. 29.Double 67 =
  30. 30.Double 49 =
  31. 31.Double 82 =
  32. 32.Half of 82 =
  33. 33.Half of 84 =
  34. 34.Half of 52 =
  35. 35.Double 19 =
  36. 36.Half of 132 =
  37. 37.Double 39 =
  38. 38.Double 29 =
  39. 39.Double 28 =
  40. 40.Half of 96 =

Answer key

  1. 144
  2. 124
  3. 128
  4. 9
  5. 162
  6. 42
  7. 168
  8. 126
  9. 39
  10. 106
  11. 72
  12. 190
  13. 49
  14. 170
  15. 19
  16. 150
  17. 36
  18. 122
  19. 26
  20. 96
  21. 132
  22. 82
  23. 188
  24. 76
  25. 154
  26. 22
  27. 196
  28. 91
  29. 134
  30. 98
  31. 164
  32. 41
  33. 42
  34. 26
  35. 38
  36. 66
  37. 78
  38. 58
  39. 56
  40. 48

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