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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 462 · 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 66 =
  2. 2.Half of 24 =
  3. 3.Double 15 =
  4. 4.Half of 62 =
  5. 5.Double 61 =
  6. 6.Double 63 =
  7. 7.Half of 136 =
  8. 8.Double 41 =
  9. 9.Half of 72 =
  10. 10.Half of 46 =
  11. 11.Half of 132 =
  12. 12.Double 31 =
  13. 13.Half of 122 =
  14. 14.Double 34 =
  15. 15.Double 64 =
  16. 16.Half of 66 =
  17. 17.Half of 152 =
  18. 18.Half of 98 =
  19. 19.Half of 166 =
  20. 20.Double 33 =
  21. 21.Half of 32 =
  22. 22.Half of 38 =
  23. 23.Double 16 =
  24. 24.Double 24 =
  25. 25.Double 19 =
  26. 26.Double 95 =
  27. 27.Double 45 =
  28. 28.Double 96 =
  29. 29.Half of 102 =
  30. 30.Half of 78 =
  31. 31.Double 37 =
  32. 32.Half of 174 =
  33. 33.Double 93 =
  34. 34.Half of 112 =
  35. 35.Double 88 =
  36. 36.Half of 92 =
  37. 37.Double 26 =
  38. 38.Double 25 =
  39. 39.Half of 54 =
  40. 40.Double 49 =

Answer key

  1. 132
  2. 12
  3. 30
  4. 31
  5. 122
  6. 126
  7. 68
  8. 82
  9. 36
  10. 23
  11. 66
  12. 62
  13. 61
  14. 68
  15. 128
  16. 33
  17. 76
  18. 49
  19. 83
  20. 66
  21. 16
  22. 19
  23. 32
  24. 48
  25. 38
  26. 190
  27. 90
  28. 192
  29. 51
  30. 39
  31. 74
  32. 87
  33. 186
  34. 56
  35. 176
  36. 46
  37. 52
  38. 50
  39. 27
  40. 98

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