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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 287 · 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 132 =
  2. 2.Double 22 =
  3. 3.Double 47 =
  4. 4.Double 49 =
  5. 5.Half of 106 =
  6. 6.Double 79 =
  7. 7.Double 13 =
  8. 8.Double 28 =
  9. 9.Half of 18 =
  10. 10.Half of 44 =
  11. 11.Double 58 =
  12. 12.Double 77 =
  13. 13.Half of 74 =
  14. 14.Double 65 =
  15. 15.Double 32 =
  16. 16.Double 34 =
  17. 17.Half of 108 =
  18. 18.Double 97 =
  19. 19.Double 35 =
  20. 20.Double 63 =
  21. 21.Double 84 =
  22. 22.Double 11 =
  23. 23.Double 81 =
  24. 24.Double 98 =
  25. 25.Double 91 =
  26. 26.Half of 114 =
  27. 27.Half of 182 =
  28. 28.Double 93 =
  29. 29.Double 15 =
  30. 30.Half of 24 =
  31. 31.Double 68 =
  32. 32.Half of 98 =
  33. 33.Half of 36 =
  34. 34.Half of 32 =
  35. 35.Half of 166 =
  36. 36.Double 66 =
  37. 37.Double 24 =
  38. 38.Half of 92 =
  39. 39.Double 75 =
  40. 40.Half of 52 =

Answer key

  1. 66
  2. 44
  3. 94
  4. 98
  5. 53
  6. 158
  7. 26
  8. 56
  9. 9
  10. 22
  11. 116
  12. 154
  13. 37
  14. 130
  15. 64
  16. 68
  17. 54
  18. 194
  19. 70
  20. 126
  21. 168
  22. 22
  23. 162
  24. 196
  25. 182
  26. 57
  27. 91
  28. 186
  29. 30
  30. 12
  31. 136
  32. 49
  33. 18
  34. 16
  35. 83
  36. 132
  37. 48
  38. 46
  39. 150
  40. 26

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