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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 495 · 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 59 =
  2. 2.Half of 108 =
  3. 3.Double 89 =
  4. 4.Double 21 =
  5. 5.Double 62 =
  6. 6.Double 91 =
  7. 7.Double 39 =
  8. 8.Double 75 =
  9. 9.Double 88 =
  10. 10.Half of 16 =
  11. 11.Double 55 =
  12. 12.Double 54 =
  13. 13.Double 71 =
  14. 14.Double 48 =
  15. 15.Half of 32 =
  16. 16.Double 44 =
  17. 17.Double 36 =
  18. 18.Half of 144 =
  19. 19.Double 52 =
  20. 20.Half of 122 =
  21. 21.Half of 46 =
  22. 22.Double 79 =
  23. 23.Double 51 =
  24. 24.Double 43 =
  25. 25.Half of 136 =
  26. 26.Double 23 =
  27. 27.Half of 142 =
  28. 28.Half of 172 =
  29. 29.Double 98 =
  30. 30.Double 73 =
  31. 31.Double 41 =
  32. 32.Half of 186 =
  33. 33.Double 28 =
  34. 34.Half of 132 =
  35. 35.Half of 152 =
  36. 36.Half of 196 =
  37. 37.Half of 72 =
  38. 38.Double 69 =
  39. 39.Double 12 =
  40. 40.Half of 52 =

Answer key

  1. 118
  2. 54
  3. 178
  4. 42
  5. 124
  6. 182
  7. 78
  8. 150
  9. 176
  10. 8
  11. 110
  12. 108
  13. 142
  14. 96
  15. 16
  16. 88
  17. 72
  18. 72
  19. 104
  20. 61
  21. 23
  22. 158
  23. 102
  24. 86
  25. 68
  26. 46
  27. 71
  28. 86
  29. 196
  30. 146
  31. 82
  32. 93
  33. 56
  34. 66
  35. 76
  36. 98
  37. 36
  38. 138
  39. 24
  40. 26

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