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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 796 · 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 55 =
  2. 2.Double 81 =
  3. 3.Half of 196 =
  4. 4.Double 63 =
  5. 5.Double 16 =
  6. 6.Double 27 =
  7. 7.Double 76 =
  8. 8.Half of 22 =
  9. 9.Double 86 =
  10. 10.Half of 124 =
  11. 11.Double 21 =
  12. 12.Double 15 =
  13. 13.Double 41 =
  14. 14.Half of 54 =
  15. 15.Double 11 =
  16. 16.Half of 76 =
  17. 17.Half of 38 =
  18. 18.Half of 74 =
  19. 19.Double 61 =
  20. 20.Half of 34 =
  21. 21.Double 92 =
  22. 22.Half of 46 =
  23. 23.Double 97 =
  24. 24.Double 66 =
  25. 25.Half of 68 =
  26. 26.Double 26 =
  27. 27.Half of 64 =
  28. 28.Double 75 =
  29. 29.Half of 62 =
  30. 30.Double 73 =
  31. 31.Double 87 =
  32. 32.Half of 152 =
  33. 33.Double 65 =
  34. 34.Half of 42 =
  35. 35.Half of 32 =
  36. 36.Double 53 =
  37. 37.Double 36 =
  38. 38.Half of 174 =
  39. 39.Double 88 =
  40. 40.Double 54 =

Answer key

  1. 110
  2. 162
  3. 98
  4. 126
  5. 32
  6. 54
  7. 152
  8. 11
  9. 172
  10. 62
  11. 42
  12. 30
  13. 82
  14. 27
  15. 22
  16. 38
  17. 19
  18. 37
  19. 122
  20. 17
  21. 184
  22. 23
  23. 194
  24. 132
  25. 34
  26. 52
  27. 32
  28. 150
  29. 31
  30. 146
  31. 174
  32. 76
  33. 130
  34. 21
  35. 16
  36. 106
  37. 72
  38. 87
  39. 176
  40. 108

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