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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 173 · 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 88 =
  2. 2.Double 36 =
  3. 3.Double 98 =
  4. 4.Double 23 =
  5. 5.Double 66 =
  6. 6.Half of 64 =
  7. 7.Double 51 =
  8. 8.Half of 14 =
  9. 9.Double 17 =
  10. 10.Double 78 =
  11. 11.Half of 126 =
  12. 12.Half of 42 =
  13. 13.Double 77 =
  14. 14.Half of 142 =
  15. 15.Half of 172 =
  16. 16.Double 65 =
  17. 17.Half of 112 =
  18. 18.Double 73 =
  19. 19.Double 49 =
  20. 20.Half of 94 =
  21. 21.Double 81 =
  22. 22.Half of 192 =
  23. 23.Half of 168 =
  24. 24.Half of 158 =
  25. 25.Double 55 =
  26. 26.Half of 122 =
  27. 27.Double 79 =
  28. 28.Double 28 =
  29. 29.Double 15 =
  30. 30.Double 68 =
  31. 31.Double 52 =
  32. 32.Double 41 =
  33. 33.Double 72 =
  34. 34.Double 27 =
  35. 35.Double 35 =
  36. 36.Half of 152 =
  37. 37.Half of 28 =
  38. 38.Half of 12 =
  39. 39.Half of 24 =
  40. 40.Double 92 =

Answer key

  1. 176
  2. 72
  3. 196
  4. 46
  5. 132
  6. 32
  7. 102
  8. 7
  9. 34
  10. 156
  11. 63
  12. 21
  13. 154
  14. 71
  15. 86
  16. 130
  17. 56
  18. 146
  19. 98
  20. 47
  21. 162
  22. 96
  23. 84
  24. 79
  25. 110
  26. 61
  27. 158
  28. 56
  29. 30
  30. 136
  31. 104
  32. 82
  33. 144
  34. 54
  35. 70
  36. 76
  37. 14
  38. 6
  39. 12
  40. 184

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