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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 400 · 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 17 =
  2. 2.Double 91 =
  3. 3.Half of 144 =
  4. 4.Double 51 =
  5. 5.Double 82 =
  6. 6.Half of 22 =
  7. 7.Half of 18 =
  8. 8.Half of 152 =
  9. 9.Double 22 =
  10. 10.Double 49 =
  11. 11.Double 89 =
  12. 12.Double 73 =
  13. 13.Double 68 =
  14. 14.Half of 12 =
  15. 15.Double 55 =
  16. 16.Double 29 =
  17. 17.Double 75 =
  18. 18.Double 15 =
  19. 19.Half of 108 =
  20. 20.Double 87 =
  21. 21.Double 88 =
  22. 22.Half of 162 =
  23. 23.Half of 142 =
  24. 24.Double 38 =
  25. 25.Double 98 =
  26. 26.Double 81 =
  27. 27.Double 48 =
  28. 28.Double 14 =
  29. 29.Double 45 =
  30. 30.Half of 88 =
  31. 31.Double 32 =
  32. 32.Half of 148 =
  33. 33.Half of 126 =
  34. 34.Half of 26 =
  35. 35.Half of 186 =
  36. 36.Double 35 =
  37. 37.Double 28 =
  38. 38.Half of 188 =
  39. 39.Double 56 =
  40. 40.Double 66 =

Answer key

  1. 34
  2. 182
  3. 72
  4. 102
  5. 164
  6. 11
  7. 9
  8. 76
  9. 44
  10. 98
  11. 178
  12. 146
  13. 136
  14. 6
  15. 110
  16. 58
  17. 150
  18. 30
  19. 54
  20. 174
  21. 176
  22. 81
  23. 71
  24. 76
  25. 196
  26. 162
  27. 96
  28. 28
  29. 90
  30. 44
  31. 64
  32. 74
  33. 63
  34. 13
  35. 93
  36. 70
  37. 56
  38. 94
  39. 112
  40. 132

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