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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 507 · 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 43 =
  2. 2.Half of 48 =
  3. 3.Double 88 =
  4. 4.Double 98 =
  5. 5.Double 51 =
  6. 6.Half of 174 =
  7. 7.Double 71 =
  8. 8.Half of 112 =
  9. 9.Half of 128 =
  10. 10.Half of 46 =
  11. 11.Half of 36 =
  12. 12.Double 79 =
  13. 13.Half of 126 =
  14. 14.Double 39 =
  15. 15.Double 45 =
  16. 16.Double 14 =
  17. 17.Half of 28 =
  18. 18.Half of 154 =
  19. 19.Half of 198 =
  20. 20.Half of 66 =
  21. 21.Double 81 =
  22. 22.Double 96 =
  23. 23.Double 22 =
  24. 24.Double 32 =
  25. 25.Half of 182 =
  26. 26.Half of 64 =
  27. 27.Double 91 =
  28. 28.Double 41 =
  29. 29.Double 21 =
  30. 30.Half of 38 =
  31. 31.Half of 78 =
  32. 32.Double 86 =
  33. 33.Double 28 =
  34. 34.Double 23 =
  35. 35.Half of 26 =
  36. 36.Double 47 =
  37. 37.Double 93 =
  38. 38.Double 72 =
  39. 39.Double 84 =
  40. 40.Double 67 =

Answer key

  1. 86
  2. 24
  3. 176
  4. 196
  5. 102
  6. 87
  7. 142
  8. 56
  9. 64
  10. 23
  11. 18
  12. 158
  13. 63
  14. 78
  15. 90
  16. 28
  17. 14
  18. 77
  19. 99
  20. 33
  21. 162
  22. 192
  23. 44
  24. 64
  25. 91
  26. 32
  27. 182
  28. 82
  29. 42
  30. 19
  31. 39
  32. 172
  33. 56
  34. 46
  35. 13
  36. 94
  37. 186
  38. 144
  39. 168
  40. 134

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