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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 243 · 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 36 =
  2. 2.Double 68 =
  3. 3.Double 41 =
  4. 4.Double 15 =
  5. 5.Double 29 =
  6. 6.Half of 98 =
  7. 7.Half of 186 =
  8. 8.Double 22 =
  9. 9.Half of 198 =
  10. 10.Half of 196 =
  11. 11.Double 54 =
  12. 12.Double 75 =
  13. 13.Double 57 =
  14. 14.Double 97 =
  15. 15.Half of 172 =
  16. 16.Half of 52 =
  17. 17.Double 24 =
  18. 18.Double 61 =
  19. 19.Double 87 =
  20. 20.Half of 42 =
  21. 21.Half of 66 =
  22. 22.Double 39 =
  23. 23.Half of 32 =
  24. 24.Double 94 =
  25. 25.Double 81 =
  26. 26.Double 19 =
  27. 27.Half of 22 =
  28. 28.Double 34 =
  29. 29.Double 91 =
  30. 30.Half of 164 =
  31. 31.Half of 182 =
  32. 32.Half of 122 =
  33. 33.Half of 176 =
  34. 34.Half of 48 =
  35. 35.Half of 154 =
  36. 36.Half of 112 =
  37. 37.Half of 74 =
  38. 38.Half of 116 =
  39. 39.Half of 126 =
  40. 40.Double 88 =

Answer key

  1. 72
  2. 136
  3. 82
  4. 30
  5. 58
  6. 49
  7. 93
  8. 44
  9. 99
  10. 98
  11. 108
  12. 150
  13. 114
  14. 194
  15. 86
  16. 26
  17. 48
  18. 122
  19. 174
  20. 21
  21. 33
  22. 78
  23. 16
  24. 188
  25. 162
  26. 38
  27. 11
  28. 68
  29. 182
  30. 82
  31. 91
  32. 61
  33. 88
  34. 24
  35. 77
  36. 56
  37. 37
  38. 58
  39. 63
  40. 176

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