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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 336 · 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.Half of 106 =
  2. 2.Half of 102 =
  3. 3.Double 91 =
  4. 4.Double 39 =
  5. 5.Double 82 =
  6. 6.Half of 68 =
  7. 7.Half of 122 =
  8. 8.Double 87 =
  9. 9.Double 16 =
  10. 10.Double 31 =
  11. 11.Double 73 =
  12. 12.Half of 24 =
  13. 13.Double 71 =
  14. 14.Half of 44 =
  15. 15.Double 61 =
  16. 16.Double 98 =
  17. 17.Double 18 =
  18. 18.Double 72 =
  19. 19.Half of 92 =
  20. 20.Double 26 =
  21. 21.Half of 48 =
  22. 22.Double 95 =
  23. 23.Double 51 =
  24. 24.Half of 172 =
  25. 25.Double 56 =
  26. 26.Double 75 =
  27. 27.Double 88 =
  28. 28.Double 28 =
  29. 29.Double 83 =
  30. 30.Double 96 =
  31. 31.Double 65 =
  32. 32.Double 29 =
  33. 33.Half of 184 =
  34. 34.Half of 28 =
  35. 35.Double 35 =
  36. 36.Half of 148 =
  37. 37.Double 62 =
  38. 38.Double 46 =
  39. 39.Double 36 =
  40. 40.Double 86 =

Answer key

  1. 53
  2. 51
  3. 182
  4. 78
  5. 164
  6. 34
  7. 61
  8. 174
  9. 32
  10. 62
  11. 146
  12. 12
  13. 142
  14. 22
  15. 122
  16. 196
  17. 36
  18. 144
  19. 46
  20. 52
  21. 24
  22. 190
  23. 102
  24. 86
  25. 112
  26. 150
  27. 176
  28. 56
  29. 166
  30. 192
  31. 130
  32. 58
  33. 92
  34. 14
  35. 70
  36. 74
  37. 124
  38. 92
  39. 72
  40. 172

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