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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 154 · 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 41 =
  2. 2.Half of 64 =
  3. 3.Half of 82 =
  4. 4.Half of 112 =
  5. 5.Double 64 =
  6. 6.Double 25 =
  7. 7.Half of 104 =
  8. 8.Double 67 =
  9. 9.Half of 116 =
  10. 10.Double 28 =
  11. 11.Double 31 =
  12. 12.Half of 12 =
  13. 13.Half of 192 =
  14. 14.Double 61 =
  15. 15.Double 22 =
  16. 16.Double 74 =
  17. 17.Double 16 =
  18. 18.Double 78 =
  19. 19.Half of 44 =
  20. 20.Half of 52 =
  21. 21.Half of 22 =
  22. 22.Double 86 =
  23. 23.Half of 94 =
  24. 24.Double 45 =
  25. 25.Half of 54 =
  26. 26.Double 44 =
  27. 27.Half of 196 =
  28. 28.Half of 14 =
  29. 29.Half of 124 =
  30. 30.Double 33 =
  31. 31.Half of 176 =
  32. 32.Half of 76 =
  33. 33.Half of 28 =
  34. 34.Double 43 =
  35. 35.Half of 32 =
  36. 36.Half of 182 =
  37. 37.Half of 74 =
  38. 38.Half of 162 =
  39. 39.Half of 58 =
  40. 40.Double 63 =

Answer key

  1. 82
  2. 32
  3. 41
  4. 56
  5. 128
  6. 50
  7. 52
  8. 134
  9. 58
  10. 56
  11. 62
  12. 6
  13. 96
  14. 122
  15. 44
  16. 148
  17. 32
  18. 156
  19. 22
  20. 26
  21. 11
  22. 172
  23. 47
  24. 90
  25. 27
  26. 88
  27. 98
  28. 7
  29. 62
  30. 66
  31. 88
  32. 38
  33. 14
  34. 86
  35. 16
  36. 91
  37. 37
  38. 81
  39. 29
  40. 126

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