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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 622 · 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 53 =
  2. 2.Half of 82 =
  3. 3.Half of 112 =
  4. 4.Half of 62 =
  5. 5.Double 46 =
  6. 6.Double 84 =
  7. 7.Double 43 =
  8. 8.Double 72 =
  9. 9.Half of 22 =
  10. 10.Double 81 =
  11. 11.Double 51 =
  12. 12.Double 69 =
  13. 13.Double 45 =
  14. 14.Double 87 =
  15. 15.Half of 34 =
  16. 16.Half of 106 =
  17. 17.Half of 198 =
  18. 18.Double 85 =
  19. 19.Double 18 =
  20. 20.Double 31 =
  21. 21.Half of 52 =
  22. 22.Half of 36 =
  23. 23.Double 34 =
  24. 24.Half of 102 =
  25. 25.Half of 196 =
  26. 26.Double 14 =
  27. 27.Half of 72 =
  28. 28.Half of 174 =
  29. 29.Double 21 =
  30. 30.Half of 58 =
  31. 31.Double 75 =
  32. 32.Half of 156 =
  33. 33.Half of 114 =
  34. 34.Double 13 =
  35. 35.Double 12 =
  36. 36.Double 35 =
  37. 37.Half of 192 =
  38. 38.Half of 96 =
  39. 39.Double 11 =
  40. 40.Half of 98 =

Answer key

  1. 106
  2. 41
  3. 56
  4. 31
  5. 92
  6. 168
  7. 86
  8. 144
  9. 11
  10. 162
  11. 102
  12. 138
  13. 90
  14. 174
  15. 17
  16. 53
  17. 99
  18. 170
  19. 36
  20. 62
  21. 26
  22. 18
  23. 68
  24. 51
  25. 98
  26. 28
  27. 36
  28. 87
  29. 42
  30. 29
  31. 150
  32. 78
  33. 57
  34. 26
  35. 24
  36. 70
  37. 96
  38. 48
  39. 22
  40. 49

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