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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 285 · 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 22 =
  2. 2.Double 34 =
  3. 3.Double 85 =
  4. 4.Double 29 =
  5. 5.Double 55 =
  6. 6.Double 27 =
  7. 7.Double 51 =
  8. 8.Double 98 =
  9. 9.Double 15 =
  10. 10.Double 93 =
  11. 11.Half of 38 =
  12. 12.Double 84 =
  13. 13.Half of 166 =
  14. 14.Half of 94 =
  15. 15.Double 83 =
  16. 16.Double 31 =
  17. 17.Double 25 =
  18. 18.Double 16 =
  19. 19.Half of 142 =
  20. 20.Half of 66 =
  21. 21.Double 88 =
  22. 22.Double 24 =
  23. 23.Half of 152 =
  24. 24.Double 81 =
  25. 25.Double 87 =
  26. 26.Half of 148 =
  27. 27.Double 68 =
  28. 28.Half of 54 =
  29. 29.Half of 102 =
  30. 30.Half of 144 =
  31. 31.Half of 76 =
  32. 32.Double 54 =
  33. 33.Double 78 =
  34. 34.Double 17 =
  35. 35.Double 65 =
  36. 36.Half of 26 =
  37. 37.Half of 78 =
  38. 38.Half of 114 =
  39. 39.Half of 32 =
  40. 40.Double 46 =

Answer key

  1. 11
  2. 68
  3. 170
  4. 58
  5. 110
  6. 54
  7. 102
  8. 196
  9. 30
  10. 186
  11. 19
  12. 168
  13. 83
  14. 47
  15. 166
  16. 62
  17. 50
  18. 32
  19. 71
  20. 33
  21. 176
  22. 48
  23. 76
  24. 162
  25. 174
  26. 74
  27. 136
  28. 27
  29. 51
  30. 72
  31. 38
  32. 108
  33. 156
  34. 34
  35. 130
  36. 13
  37. 39
  38. 57
  39. 16
  40. 92

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