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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 301 · 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 154 =
  2. 2.Double 14 =
  3. 3.Half of 106 =
  4. 4.Double 31 =
  5. 5.Double 56 =
  6. 6.Double 87 =
  7. 7.Double 81 =
  8. 8.Double 41 =
  9. 9.Half of 46 =
  10. 10.Double 23 =
  11. 11.Half of 74 =
  12. 12.Half of 188 =
  13. 13.Half of 32 =
  14. 14.Double 36 =
  15. 15.Double 21 =
  16. 16.Half of 152 =
  17. 17.Double 83 =
  18. 18.Half of 132 =
  19. 19.Half of 148 =
  20. 20.Double 24 =
  21. 21.Half of 96 =
  22. 22.Double 44 =
  23. 23.Double 35 =
  24. 24.Double 63 =
  25. 25.Double 16 =
  26. 26.Half of 72 =
  27. 27.Half of 78 =
  28. 28.Double 11 =
  29. 29.Half of 22 =
  30. 30.Half of 36 =
  31. 31.Half of 198 =
  32. 32.Double 76 =
  33. 33.Double 93 =
  34. 34.Half of 138 =
  35. 35.Half of 92 =
  36. 36.Double 51 =
  37. 37.Double 32 =
  38. 38.Double 26 =
  39. 39.Half of 174 =
  40. 40.Half of 176 =

Answer key

  1. 77
  2. 28
  3. 53
  4. 62
  5. 112
  6. 174
  7. 162
  8. 82
  9. 23
  10. 46
  11. 37
  12. 94
  13. 16
  14. 72
  15. 42
  16. 76
  17. 166
  18. 66
  19. 74
  20. 48
  21. 48
  22. 88
  23. 70
  24. 126
  25. 32
  26. 36
  27. 39
  28. 22
  29. 11
  30. 18
  31. 99
  32. 152
  33. 186
  34. 69
  35. 46
  36. 102
  37. 64
  38. 52
  39. 87
  40. 88

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