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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 810 · 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 98 =
  2. 2.Double 91 =
  3. 3.Double 25 =
  4. 4.Half of 52 =
  5. 5.Half of 32 =
  6. 6.Double 42 =
  7. 7.Double 36 =
  8. 8.Half of 128 =
  9. 9.Double 47 =
  10. 10.Double 11 =
  11. 11.Double 67 =
  12. 12.Double 97 =
  13. 13.Double 12 =
  14. 14.Half of 22 =
  15. 15.Half of 198 =
  16. 16.Double 39 =
  17. 17.Half of 178 =
  18. 18.Half of 12 =
  19. 19.Double 82 =
  20. 20.Double 56 =
  21. 21.Double 22 =
  22. 22.Half of 122 =
  23. 23.Half of 44 =
  24. 24.Half of 18 =
  25. 25.Double 49 =
  26. 26.Double 89 =
  27. 27.Double 35 =
  28. 28.Half of 196 =
  29. 29.Half of 26 =
  30. 30.Double 51 =
  31. 31.Double 41 =
  32. 32.Double 27 =
  33. 33.Half of 162 =
  34. 34.Half of 124 =
  35. 35.Double 32 =
  36. 36.Half of 66 =
  37. 37.Half of 102 =
  38. 38.Double 92 =
  39. 39.Double 16 =
  40. 40.Double 58 =

Answer key

  1. 196
  2. 182
  3. 50
  4. 26
  5. 16
  6. 84
  7. 72
  8. 64
  9. 94
  10. 22
  11. 134
  12. 194
  13. 24
  14. 11
  15. 99
  16. 78
  17. 89
  18. 6
  19. 164
  20. 112
  21. 44
  22. 61
  23. 22
  24. 9
  25. 98
  26. 178
  27. 70
  28. 98
  29. 13
  30. 102
  31. 82
  32. 54
  33. 81
  34. 62
  35. 64
  36. 33
  37. 51
  38. 184
  39. 32
  40. 116

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