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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 292 · 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 72 =
  2. 2.Double 71 =
  3. 3.Half of 24 =
  4. 4.Double 13 =
  5. 5.Half of 142 =
  6. 6.Double 73 =
  7. 7.Double 31 =
  8. 8.Double 47 =
  9. 9.Double 29 =
  10. 10.Double 11 =
  11. 11.Half of 116 =
  12. 12.Half of 16 =
  13. 13.Half of 72 =
  14. 14.Double 69 =
  15. 15.Double 75 =
  16. 16.Half of 198 =
  17. 17.Double 19 =
  18. 18.Double 61 =
  19. 19.Double 67 =
  20. 20.Half of 192 =
  21. 21.Double 83 =
  22. 22.Double 92 =
  23. 23.Double 44 =
  24. 24.Double 63 =
  25. 25.Half of 124 =
  26. 26.Double 27 =
  27. 27.Double 12 =
  28. 28.Half of 32 =
  29. 29.Double 77 =
  30. 30.Double 41 =
  31. 31.Half of 196 =
  32. 32.Double 86 =
  33. 33.Double 49 =
  34. 34.Half of 182 =
  35. 35.Half of 168 =
  36. 36.Half of 22 =
  37. 37.Double 22 =
  38. 38.Half of 166 =
  39. 39.Half of 12 =
  40. 40.Double 26 =

Answer key

  1. 144
  2. 142
  3. 12
  4. 26
  5. 71
  6. 146
  7. 62
  8. 94
  9. 58
  10. 22
  11. 58
  12. 8
  13. 36
  14. 138
  15. 150
  16. 99
  17. 38
  18. 122
  19. 134
  20. 96
  21. 166
  22. 184
  23. 88
  24. 126
  25. 62
  26. 54
  27. 24
  28. 16
  29. 154
  30. 82
  31. 98
  32. 172
  33. 98
  34. 91
  35. 84
  36. 11
  37. 44
  38. 83
  39. 6
  40. 52

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