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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 125 · 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 61 =
  2. 2.Double 32 =
  3. 3.Double 74 =
  4. 4.Double 46 =
  5. 5.Double 26 =
  6. 6.Half of 168 =
  7. 7.Half of 12 =
  8. 8.Half of 196 =
  9. 9.Half of 18 =
  10. 10.Double 49 =
  11. 11.Double 42 =
  12. 12.Double 92 =
  13. 13.Half of 32 =
  14. 14.Double 85 =
  15. 15.Half of 112 =
  16. 16.Double 91 =
  17. 17.Half of 52 =
  18. 18.Half of 158 =
  19. 19.Double 19 =
  20. 20.Half of 152 =
  21. 21.Half of 164 =
  22. 22.Double 57 =
  23. 23.Half of 66 =
  24. 24.Double 88 =
  25. 25.Double 33 =
  26. 26.Half of 26 =
  27. 27.Half of 172 =
  28. 28.Double 29 =
  29. 29.Double 14 =
  30. 30.Half of 72 =
  31. 31.Half of 148 =
  32. 32.Half of 178 =
  33. 33.Double 82 =
  34. 34.Half of 86 =
  35. 35.Half of 102 =
  36. 36.Double 73 =
  37. 37.Double 28 =
  38. 38.Double 21 =
  39. 39.Half of 64 =
  40. 40.Double 52 =

Answer key

  1. 122
  2. 64
  3. 148
  4. 92
  5. 52
  6. 84
  7. 6
  8. 98
  9. 9
  10. 98
  11. 84
  12. 184
  13. 16
  14. 170
  15. 56
  16. 182
  17. 26
  18. 79
  19. 38
  20. 76
  21. 82
  22. 114
  23. 33
  24. 176
  25. 66
  26. 13
  27. 86
  28. 58
  29. 28
  30. 36
  31. 74
  32. 89
  33. 164
  34. 43
  35. 51
  36. 146
  37. 56
  38. 42
  39. 32
  40. 104

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