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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 815 · 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 74 =
  2. 2.Double 29 =
  3. 3.Half of 102 =
  4. 4.Double 12 =
  5. 5.Half of 182 =
  6. 6.Double 79 =
  7. 7.Double 65 =
  8. 8.Half of 46 =
  9. 9.Double 37 =
  10. 10.Double 45 =
  11. 11.Double 38 =
  12. 12.Double 58 =
  13. 13.Double 14 =
  14. 14.Double 36 =
  15. 15.Double 25 =
  16. 16.Double 56 =
  17. 17.Half of 124 =
  18. 18.Double 17 =
  19. 19.Half of 42 =
  20. 20.Double 22 =
  21. 21.Double 88 =
  22. 22.Double 78 =
  23. 23.Double 43 =
  24. 24.Double 47 =
  25. 25.Half of 122 =
  26. 26.Half of 178 =
  27. 27.Double 48 =
  28. 28.Half of 82 =
  29. 29.Double 59 =
  30. 30.Half of 186 =
  31. 31.Half of 196 =
  32. 32.Double 15 =
  33. 33.Half of 144 =
  34. 34.Half of 62 =
  35. 35.Double 31 =
  36. 36.Half of 132 =
  37. 37.Double 13 =
  38. 38.Double 24 =
  39. 39.Double 21 =
  40. 40.Double 92 =

Answer key

  1. 148
  2. 58
  3. 51
  4. 24
  5. 91
  6. 158
  7. 130
  8. 23
  9. 74
  10. 90
  11. 76
  12. 116
  13. 28
  14. 72
  15. 50
  16. 112
  17. 62
  18. 34
  19. 21
  20. 44
  21. 176
  22. 156
  23. 86
  24. 94
  25. 61
  26. 89
  27. 96
  28. 41
  29. 118
  30. 93
  31. 98
  32. 30
  33. 72
  34. 31
  35. 62
  36. 66
  37. 26
  38. 48
  39. 42
  40. 184

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