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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 424 · 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 62 =
  2. 2.Double 18 =
  3. 3.Half of 162 =
  4. 4.Half of 44 =
  5. 5.Half of 22 =
  6. 6.Half of 122 =
  7. 7.Half of 132 =
  8. 8.Double 51 =
  9. 9.Double 38 =
  10. 10.Double 25 =
  11. 11.Double 65 =
  12. 12.Half of 26 =
  13. 13.Half of 48 =
  14. 14.Half of 112 =
  15. 15.Half of 52 =
  16. 16.Double 71 =
  17. 17.Double 33 =
  18. 18.Double 41 =
  19. 19.Double 53 =
  20. 20.Double 74 =
  21. 21.Half of 72 =
  22. 22.Double 76 =
  23. 23.Double 86 =
  24. 24.Double 19 =
  25. 25.Double 59 =
  26. 26.Double 21 =
  27. 27.Half of 154 =
  28. 28.Double 28 =
  29. 29.Double 42 =
  30. 30.Half of 92 =
  31. 31.Half of 38 =
  32. 32.Half of 16 =
  33. 33.Double 56 =
  34. 34.Double 49 =
  35. 35.Double 48 =
  36. 36.Half of 108 =
  37. 37.Double 84 =
  38. 38.Double 15 =
  39. 39.Half of 136 =
  40. 40.Half of 192 =

Answer key

  1. 124
  2. 36
  3. 81
  4. 22
  5. 11
  6. 61
  7. 66
  8. 102
  9. 76
  10. 50
  11. 130
  12. 13
  13. 24
  14. 56
  15. 26
  16. 142
  17. 66
  18. 82
  19. 106
  20. 148
  21. 36
  22. 152
  23. 172
  24. 38
  25. 118
  26. 42
  27. 77
  28. 56
  29. 84
  30. 46
  31. 19
  32. 8
  33. 112
  34. 98
  35. 96
  36. 54
  37. 168
  38. 30
  39. 68
  40. 96

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