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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 36 · 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 76 =
  2. 2.Double 91 =
  3. 3.Half of 82 =
  4. 4.Half of 32 =
  5. 5.Half of 54 =
  6. 6.Double 44 =
  7. 7.Double 14 =
  8. 8.Double 49 =
  9. 9.Half of 92 =
  10. 10.Half of 162 =
  11. 11.Half of 192 =
  12. 12.Double 74 =
  13. 13.Double 53 =
  14. 14.Half of 154 =
  15. 15.Double 54 =
  16. 16.Half of 78 =
  17. 17.Double 84 =
  18. 18.Double 88 =
  19. 19.Double 29 =
  20. 20.Double 33 =
  21. 21.Half of 146 =
  22. 22.Half of 178 =
  23. 23.Half of 56 =
  24. 24.Half of 34 =
  25. 25.Double 81 =
  26. 26.Double 69 =
  27. 27.Double 31 =
  28. 28.Half of 52 =
  29. 29.Half of 112 =
  30. 30.Double 65 =
  31. 31.Double 64 =
  32. 32.Half of 76 =
  33. 33.Double 89 =
  34. 34.Double 21 =
  35. 35.Double 43 =
  36. 36.Half of 38 =
  37. 37.Double 25 =
  38. 38.Double 98 =
  39. 39.Half of 26 =
  40. 40.Half of 194 =

Answer key

  1. 152
  2. 182
  3. 41
  4. 16
  5. 27
  6. 88
  7. 28
  8. 98
  9. 46
  10. 81
  11. 96
  12. 148
  13. 106
  14. 77
  15. 108
  16. 39
  17. 168
  18. 176
  19. 58
  20. 66
  21. 73
  22. 89
  23. 28
  24. 17
  25. 162
  26. 138
  27. 62
  28. 26
  29. 56
  30. 130
  31. 128
  32. 38
  33. 178
  34. 42
  35. 86
  36. 19
  37. 50
  38. 196
  39. 13
  40. 97

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