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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 500 · 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 16 =
  2. 2.Half of 54 =
  3. 3.Double 71 =
  4. 4.Half of 156 =
  5. 5.Double 56 =
  6. 6.Double 73 =
  7. 7.Double 89 =
  8. 8.Half of 104 =
  9. 9.Double 46 =
  10. 10.Double 27 =
  11. 11.Half of 192 =
  12. 12.Half of 112 =
  13. 13.Double 42 =
  14. 14.Half of 48 =
  15. 15.Half of 28 =
  16. 16.Half of 102 =
  17. 17.Double 96 =
  18. 18.Double 21 =
  19. 19.Double 35 =
  20. 20.Half of 174 =
  21. 21.Double 79 =
  22. 22.Half of 122 =
  23. 23.Double 87 =
  24. 24.Double 76 =
  25. 25.Double 63 =
  26. 26.Half of 52 =
  27. 27.Half of 26 =
  28. 28.Half of 116 =
  29. 29.Double 72 =
  30. 30.Half of 86 =
  31. 31.Double 47 =
  32. 32.Double 49 =
  33. 33.Half of 88 =
  34. 34.Double 98 =
  35. 35.Half of 142 =
  36. 36.Half of 24 =
  37. 37.Double 12 =
  38. 38.Double 31 =
  39. 39.Half of 66 =
  40. 40.Double 81 =

Answer key

  1. 32
  2. 27
  3. 142
  4. 78
  5. 112
  6. 146
  7. 178
  8. 52
  9. 92
  10. 54
  11. 96
  12. 56
  13. 84
  14. 24
  15. 14
  16. 51
  17. 192
  18. 42
  19. 70
  20. 87
  21. 158
  22. 61
  23. 174
  24. 152
  25. 126
  26. 26
  27. 13
  28. 58
  29. 144
  30. 43
  31. 94
  32. 98
  33. 44
  34. 196
  35. 71
  36. 12
  37. 24
  38. 62
  39. 33
  40. 162

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