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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 655 · 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.Double 26 =
  3. 3.Double 74 =
  4. 4.Half of 112 =
  5. 5.Double 75 =
  6. 6.Double 68 =
  7. 7.Half of 144 =
  8. 8.Half of 142 =
  9. 9.Half of 192 =
  10. 10.Half of 152 =
  11. 11.Double 44 =
  12. 12.Double 71 =
  13. 13.Double 73 =
  14. 14.Double 33 =
  15. 15.Double 78 =
  16. 16.Half of 172 =
  17. 17.Half of 102 =
  18. 18.Half of 42 =
  19. 19.Half of 124 =
  20. 20.Double 91 =
  21. 21.Half of 96 =
  22. 22.Double 95 =
  23. 23.Double 55 =
  24. 24.Half of 58 =
  25. 25.Double 65 =
  26. 26.Half of 18 =
  27. 27.Double 54 =
  28. 28.Double 83 =
  29. 29.Half of 72 =
  30. 30.Double 11 =
  31. 31.Half of 32 =
  32. 32.Double 31 =
  33. 33.Half of 178 =
  34. 34.Double 81 =
  35. 35.Double 66 =
  36. 36.Half of 138 =
  37. 37.Half of 16 =
  38. 38.Half of 186 =
  39. 39.Double 99 =
  40. 40.Half of 188 =

Answer key

  1. 42
  2. 52
  3. 148
  4. 56
  5. 150
  6. 136
  7. 72
  8. 71
  9. 96
  10. 76
  11. 88
  12. 142
  13. 146
  14. 66
  15. 156
  16. 86
  17. 51
  18. 21
  19. 62
  20. 182
  21. 48
  22. 190
  23. 110
  24. 29
  25. 130
  26. 9
  27. 108
  28. 166
  29. 36
  30. 22
  31. 16
  32. 62
  33. 89
  34. 162
  35. 132
  36. 69
  37. 8
  38. 93
  39. 198
  40. 94

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