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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 135 · 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 28 =
  2. 2.Double 29 =
  3. 3.Half of 74 =
  4. 4.Double 63 =
  5. 5.Double 86 =
  6. 6.Half of 52 =
  7. 7.Double 55 =
  8. 8.Half of 134 =
  9. 9.Double 15 =
  10. 10.Half of 34 =
  11. 11.Double 17 =
  12. 12.Double 81 =
  13. 13.Double 14 =
  14. 14.Half of 176 =
  15. 15.Half of 26 =
  16. 16.Half of 22 =
  17. 17.Double 56 =
  18. 18.Double 12 =
  19. 19.Double 72 =
  20. 20.Half of 58 =
  21. 21.Double 51 =
  22. 22.Double 25 =
  23. 23.Double 49 =
  24. 24.Double 98 =
  25. 25.Double 45 =
  26. 26.Half of 68 =
  27. 27.Double 36 =
  28. 28.Double 38 =
  29. 29.Double 83 =
  30. 30.Half of 144 =
  31. 31.Half of 182 =
  32. 32.Half of 14 =
  33. 33.Half of 92 =
  34. 34.Double 53 =
  35. 35.Half of 24 =
  36. 36.Half of 62 =
  37. 37.Half of 28 =
  38. 38.Half of 162 =
  39. 39.Double 78 =
  40. 40.Half of 122 =

Answer key

  1. 56
  2. 58
  3. 37
  4. 126
  5. 172
  6. 26
  7. 110
  8. 67
  9. 30
  10. 17
  11. 34
  12. 162
  13. 28
  14. 88
  15. 13
  16. 11
  17. 112
  18. 24
  19. 144
  20. 29
  21. 102
  22. 50
  23. 98
  24. 196
  25. 90
  26. 34
  27. 72
  28. 76
  29. 166
  30. 72
  31. 91
  32. 7
  33. 46
  34. 106
  35. 12
  36. 31
  37. 14
  38. 81
  39. 156
  40. 61

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