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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 820 · 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 25 =
  2. 2.Double 52 =
  3. 3.Half of 154 =
  4. 4.Double 81 =
  5. 5.Double 19 =
  6. 6.Double 64 =
  7. 7.Double 77 =
  8. 8.Half of 72 =
  9. 9.Half of 36 =
  10. 10.Double 23 =
  11. 11.Double 76 =
  12. 12.Half of 168 =
  13. 13.Double 38 =
  14. 14.Half of 62 =
  15. 15.Half of 128 =
  16. 16.Double 56 =
  17. 17.Half of 16 =
  18. 18.Half of 66 =
  19. 19.Double 41 =
  20. 20.Double 16 =
  21. 21.Double 51 =
  22. 22.Half of 152 =
  23. 23.Half of 172 =
  24. 24.Double 29 =
  25. 25.Double 71 =
  26. 26.Double 36 =
  27. 27.Double 91 =
  28. 28.Half of 98 =
  29. 29.Double 78 =
  30. 30.Double 74 =
  31. 31.Double 62 =
  32. 32.Half of 24 =
  33. 33.Double 96 =
  34. 34.Half of 144 =
  35. 35.Half of 46 =
  36. 36.Half of 44 =
  37. 37.Half of 86 =
  38. 38.Double 42 =
  39. 39.Double 15 =
  40. 40.Double 21 =

Answer key

  1. 50
  2. 104
  3. 77
  4. 162
  5. 38
  6. 128
  7. 154
  8. 36
  9. 18
  10. 46
  11. 152
  12. 84
  13. 76
  14. 31
  15. 64
  16. 112
  17. 8
  18. 33
  19. 82
  20. 32
  21. 102
  22. 76
  23. 86
  24. 58
  25. 142
  26. 72
  27. 182
  28. 49
  29. 156
  30. 148
  31. 124
  32. 12
  33. 192
  34. 72
  35. 23
  36. 22
  37. 43
  38. 84
  39. 30
  40. 42

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