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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 268 · 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 186 =
  2. 2.Double 84 =
  3. 3.Half of 98 =
  4. 4.Double 85 =
  5. 5.Half of 12 =
  6. 6.Double 51 =
  7. 7.Half of 14 =
  8. 8.Half of 18 =
  9. 9.Half of 22 =
  10. 10.Half of 142 =
  11. 11.Double 57 =
  12. 12.Double 77 =
  13. 13.Double 49 =
  14. 14.Half of 122 =
  15. 15.Half of 72 =
  16. 16.Half of 154 =
  17. 17.Double 44 =
  18. 18.Half of 112 =
  19. 19.Half of 92 =
  20. 20.Half of 194 =
  21. 21.Half of 134 =
  22. 22.Half of 52 =
  23. 23.Double 36 =
  24. 24.Double 29 =
  25. 25.Double 26 =
  26. 26.Half of 184 =
  27. 27.Half of 68 =
  28. 28.Half of 182 =
  29. 29.Half of 56 =
  30. 30.Half of 172 =
  31. 31.Double 21 =
  32. 32.Half of 148 =
  33. 33.Double 43 =
  34. 34.Half of 126 =
  35. 35.Half of 196 =
  36. 36.Half of 158 =
  37. 37.Half of 78 =
  38. 38.Half of 36 =
  39. 39.Half of 38 =
  40. 40.Double 15 =

Answer key

  1. 93
  2. 168
  3. 49
  4. 170
  5. 6
  6. 102
  7. 7
  8. 9
  9. 11
  10. 71
  11. 114
  12. 154
  13. 98
  14. 61
  15. 36
  16. 77
  17. 88
  18. 56
  19. 46
  20. 97
  21. 67
  22. 26
  23. 72
  24. 58
  25. 52
  26. 92
  27. 34
  28. 91
  29. 28
  30. 86
  31. 42
  32. 74
  33. 86
  34. 63
  35. 98
  36. 79
  37. 39
  38. 18
  39. 19
  40. 30

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