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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 526 · 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 86 =
  2. 2.Half of 128 =
  3. 3.Half of 162 =
  4. 4.Half of 94 =
  5. 5.Double 44 =
  6. 6.Double 74 =
  7. 7.Double 63 =
  8. 8.Double 22 =
  9. 9.Double 23 =
  10. 10.Double 31 =
  11. 11.Half of 172 =
  12. 12.Half of 184 =
  13. 13.Double 47 =
  14. 14.Half of 56 =
  15. 15.Double 29 =
  16. 16.Double 11 =
  17. 17.Half of 148 =
  18. 18.Double 61 =
  19. 19.Half of 168 =
  20. 20.Half of 176 =
  21. 21.Double 15 =
  22. 22.Double 94 =
  23. 23.Half of 68 =
  24. 24.Half of 136 =
  25. 25.Double 26 =
  26. 26.Half of 72 =
  27. 27.Double 95 =
  28. 28.Double 73 =
  29. 29.Half of 144 =
  30. 30.Double 66 =
  31. 31.Half of 96 =
  32. 32.Double 81 =
  33. 33.Half of 34 =
  34. 34.Double 97 =
  35. 35.Half of 22 =
  36. 36.Double 43 =
  37. 37.Half of 116 =
  38. 38.Double 21 =
  39. 39.Double 18 =
  40. 40.Double 59 =

Answer key

  1. 172
  2. 64
  3. 81
  4. 47
  5. 88
  6. 148
  7. 126
  8. 44
  9. 46
  10. 62
  11. 86
  12. 92
  13. 94
  14. 28
  15. 58
  16. 22
  17. 74
  18. 122
  19. 84
  20. 88
  21. 30
  22. 188
  23. 34
  24. 68
  25. 52
  26. 36
  27. 190
  28. 146
  29. 72
  30. 132
  31. 48
  32. 162
  33. 17
  34. 194
  35. 11
  36. 86
  37. 58
  38. 42
  39. 36
  40. 118

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