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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 604 · 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 82 =
  2. 2.Half of 24 =
  3. 3.Half of 22 =
  4. 4.Double 98 =
  5. 5.Half of 198 =
  6. 6.Double 57 =
  7. 7.Double 12 =
  8. 8.Double 91 =
  9. 9.Half of 72 =
  10. 10.Half of 54 =
  11. 11.Half of 108 =
  12. 12.Half of 182 =
  13. 13.Double 63 =
  14. 14.Half of 166 =
  15. 15.Double 38 =
  16. 16.Double 76 =
  17. 17.Half of 112 =
  18. 18.Double 11 =
  19. 19.Double 92 =
  20. 20.Double 21 =
  21. 21.Double 81 =
  22. 22.Half of 102 =
  23. 23.Double 85 =
  24. 24.Half of 164 =
  25. 25.Half of 64 =
  26. 26.Double 53 =
  27. 27.Half of 28 =
  28. 28.Half of 34 =
  29. 29.Half of 44 =
  30. 30.Double 48 =
  31. 31.Double 42 =
  32. 32.Double 49 =
  33. 33.Double 23 =
  34. 34.Double 88 =
  35. 35.Half of 62 =
  36. 36.Double 39 =
  37. 37.Double 27 =
  38. 38.Half of 162 =
  39. 39.Double 46 =
  40. 40.Half of 142 =

Answer key

  1. 164
  2. 12
  3. 11
  4. 196
  5. 99
  6. 114
  7. 24
  8. 182
  9. 36
  10. 27
  11. 54
  12. 91
  13. 126
  14. 83
  15. 76
  16. 152
  17. 56
  18. 22
  19. 184
  20. 42
  21. 162
  22. 51
  23. 170
  24. 82
  25. 32
  26. 106
  27. 14
  28. 17
  29. 22
  30. 96
  31. 84
  32. 98
  33. 46
  34. 176
  35. 31
  36. 78
  37. 54
  38. 81
  39. 92
  40. 71

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