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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 469 · 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 136 =
  2. 2.Half of 42 =
  3. 3.Half of 14 =
  4. 4.Double 21 =
  5. 5.Double 37 =
  6. 6.Half of 46 =
  7. 7.Half of 132 =
  8. 8.Half of 72 =
  9. 9.Double 87 =
  10. 10.Half of 22 =
  11. 11.Double 96 =
  12. 12.Double 22 =
  13. 13.Half of 196 =
  14. 14.Double 64 =
  15. 15.Double 56 =
  16. 16.Half of 26 =
  17. 17.Double 55 =
  18. 18.Half of 178 =
  19. 19.Double 62 =
  20. 20.Half of 94 =
  21. 21.Half of 116 =
  22. 22.Double 26 =
  23. 23.Half of 152 =
  24. 24.Half of 78 =
  25. 25.Double 14 =
  26. 26.Double 84 =
  27. 27.Half of 82 =
  28. 28.Half of 192 =
  29. 29.Half of 98 =
  30. 30.Double 28 =
  31. 31.Double 58 =
  32. 32.Double 54 =
  33. 33.Half of 48 =
  34. 34.Double 71 =
  35. 35.Half of 64 =
  36. 36.Double 44 =
  37. 37.Half of 56 =
  38. 38.Half of 104 =
  39. 39.Double 35 =
  40. 40.Double 89 =

Answer key

  1. 68
  2. 21
  3. 7
  4. 42
  5. 74
  6. 23
  7. 66
  8. 36
  9. 174
  10. 11
  11. 192
  12. 44
  13. 98
  14. 128
  15. 112
  16. 13
  17. 110
  18. 89
  19. 124
  20. 47
  21. 58
  22. 52
  23. 76
  24. 39
  25. 28
  26. 168
  27. 41
  28. 96
  29. 49
  30. 56
  31. 116
  32. 108
  33. 24
  34. 142
  35. 32
  36. 88
  37. 28
  38. 52
  39. 70
  40. 178

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