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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 386 · 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 34 =
  2. 2.Double 62 =
  3. 3.Double 27 =
  4. 4.Double 18 =
  5. 5.Double 86 =
  6. 6.Double 41 =
  7. 7.Double 43 =
  8. 8.Half of 86 =
  9. 9.Half of 142 =
  10. 10.Double 89 =
  11. 11.Double 58 =
  12. 12.Double 22 =
  13. 13.Half of 138 =
  14. 14.Half of 82 =
  15. 15.Half of 152 =
  16. 16.Half of 178 =
  17. 17.Double 94 =
  18. 18.Double 87 =
  19. 19.Half of 52 =
  20. 20.Double 61 =
  21. 21.Double 54 =
  22. 22.Half of 64 =
  23. 23.Double 88 =
  24. 24.Double 17 =
  25. 25.Half of 18 =
  26. 26.Double 25 =
  27. 27.Double 57 =
  28. 28.Double 44 =
  29. 29.Half of 38 =
  30. 30.Double 16 =
  31. 31.Double 38 =
  32. 32.Double 78 =
  33. 33.Double 64 =
  34. 34.Half of 28 =
  35. 35.Double 32 =
  36. 36.Half of 196 =
  37. 37.Half of 162 =
  38. 38.Double 21 =
  39. 39.Double 42 =
  40. 40.Half of 158 =

Answer key

  1. 68
  2. 124
  3. 54
  4. 36
  5. 172
  6. 82
  7. 86
  8. 43
  9. 71
  10. 178
  11. 116
  12. 44
  13. 69
  14. 41
  15. 76
  16. 89
  17. 188
  18. 174
  19. 26
  20. 122
  21. 108
  22. 32
  23. 176
  24. 34
  25. 9
  26. 50
  27. 114
  28. 88
  29. 19
  30. 32
  31. 76
  32. 156
  33. 128
  34. 14
  35. 64
  36. 98
  37. 81
  38. 42
  39. 84
  40. 79

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