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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 739 · 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 31 =
  2. 2.Double 25 =
  3. 3.Half of 62 =
  4. 4.Half of 92 =
  5. 5.Double 29 =
  6. 6.Half of 68 =
  7. 7.Double 51 =
  8. 8.Double 66 =
  9. 9.Half of 84 =
  10. 10.Double 21 =
  11. 11.Double 81 =
  12. 12.Double 57 =
  13. 13.Double 14 =
  14. 14.Double 45 =
  15. 15.Double 88 =
  16. 16.Double 35 =
  17. 17.Half of 72 =
  18. 18.Double 97 =
  19. 19.Half of 46 =
  20. 20.Double 22 =
  21. 21.Double 55 =
  22. 22.Double 85 =
  23. 23.Double 62 =
  24. 24.Double 42 =
  25. 25.Double 44 =
  26. 26.Double 98 =
  27. 27.Half of 124 =
  28. 28.Half of 28 =
  29. 29.Half of 42 =
  30. 30.Half of 58 =
  31. 31.Half of 32 =
  32. 32.Double 94 =
  33. 33.Half of 34 =
  34. 34.Double 39 =
  35. 35.Half of 136 =
  36. 36.Half of 144 =
  37. 37.Half of 132 =
  38. 38.Double 77 =
  39. 39.Double 27 =
  40. 40.Half of 78 =

Answer key

  1. 62
  2. 50
  3. 31
  4. 46
  5. 58
  6. 34
  7. 102
  8. 132
  9. 42
  10. 42
  11. 162
  12. 114
  13. 28
  14. 90
  15. 176
  16. 70
  17. 36
  18. 194
  19. 23
  20. 44
  21. 110
  22. 170
  23. 124
  24. 84
  25. 88
  26. 196
  27. 62
  28. 14
  29. 21
  30. 29
  31. 16
  32. 188
  33. 17
  34. 78
  35. 68
  36. 72
  37. 66
  38. 154
  39. 54
  40. 39

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