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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 438 · 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 21 =
  2. 2.Half of 32 =
  3. 3.Half of 98 =
  4. 4.Double 37 =
  5. 5.Half of 102 =
  6. 6.Half of 12 =
  7. 7.Half of 192 =
  8. 8.Double 67 =
  9. 9.Double 75 =
  10. 10.Half of 92 =
  11. 11.Double 84 =
  12. 12.Double 61 =
  13. 13.Double 18 =
  14. 14.Half of 44 =
  15. 15.Half of 158 =
  16. 16.Half of 62 =
  17. 17.Double 57 =
  18. 18.Half of 96 =
  19. 19.Half of 162 =
  20. 20.Double 46 =
  21. 21.Half of 122 =
  22. 22.Half of 104 =
  23. 23.Double 16 =
  24. 24.Half of 172 =
  25. 25.Double 53 =
  26. 26.Double 51 =
  27. 27.Double 19 =
  28. 28.Double 42 =
  29. 29.Double 81 =
  30. 30.Double 13 =
  31. 31.Double 93 =
  32. 32.Half of 42 =
  33. 33.Half of 22 =
  34. 34.Half of 152 =
  35. 35.Half of 46 =
  36. 36.Double 96 =
  37. 37.Half of 186 =
  38. 38.Half of 52 =
  39. 39.Double 44 =
  40. 40.Half of 38 =

Answer key

  1. 42
  2. 16
  3. 49
  4. 74
  5. 51
  6. 6
  7. 96
  8. 134
  9. 150
  10. 46
  11. 168
  12. 122
  13. 36
  14. 22
  15. 79
  16. 31
  17. 114
  18. 48
  19. 81
  20. 92
  21. 61
  22. 52
  23. 32
  24. 86
  25. 106
  26. 102
  27. 38
  28. 84
  29. 162
  30. 26
  31. 186
  32. 21
  33. 11
  34. 76
  35. 23
  36. 192
  37. 93
  38. 26
  39. 88
  40. 19

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