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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 664 · 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 18 =
  2. 2.Double 87 =
  3. 3.Half of 36 =
  4. 4.Half of 48 =
  5. 5.Double 81 =
  6. 6.Double 74 =
  7. 7.Double 61 =
  8. 8.Half of 44 =
  9. 9.Double 15 =
  10. 10.Half of 166 =
  11. 11.Double 86 =
  12. 12.Half of 132 =
  13. 13.Double 21 =
  14. 14.Double 18 =
  15. 15.Double 17 =
  16. 16.Half of 142 =
  17. 17.Double 76 =
  18. 18.Half of 14 =
  19. 19.Double 83 =
  20. 20.Half of 52 =
  21. 21.Double 69 =
  22. 22.Double 25 =
  23. 23.Double 97 =
  24. 24.Half of 172 =
  25. 25.Half of 128 =
  26. 26.Half of 54 =
  27. 27.Half of 124 =
  28. 28.Half of 56 =
  29. 29.Double 56 =
  30. 30.Double 92 =
  31. 31.Half of 46 =
  32. 32.Half of 62 =
  33. 33.Double 96 =
  34. 34.Half of 24 =
  35. 35.Half of 114 =
  36. 36.Half of 174 =
  37. 37.Half of 42 =
  38. 38.Half of 112 =
  39. 39.Double 43 =
  40. 40.Half of 16 =

Answer key

  1. 9
  2. 174
  3. 18
  4. 24
  5. 162
  6. 148
  7. 122
  8. 22
  9. 30
  10. 83
  11. 172
  12. 66
  13. 42
  14. 36
  15. 34
  16. 71
  17. 152
  18. 7
  19. 166
  20. 26
  21. 138
  22. 50
  23. 194
  24. 86
  25. 64
  26. 27
  27. 62
  28. 28
  29. 112
  30. 184
  31. 23
  32. 31
  33. 192
  34. 12
  35. 57
  36. 87
  37. 21
  38. 56
  39. 86
  40. 8

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