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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 356 · 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 51 =
  2. 2.Double 78 =
  3. 3.Double 29 =
  4. 4.Half of 54 =
  5. 5.Double 38 =
  6. 6.Half of 62 =
  7. 7.Double 47 =
  8. 8.Double 58 =
  9. 9.Double 71 =
  10. 10.Double 83 =
  11. 11.Double 55 =
  12. 12.Double 17 =
  13. 13.Double 21 =
  14. 14.Half of 66 =
  15. 15.Double 31 =
  16. 16.Half of 24 =
  17. 17.Double 64 =
  18. 18.Double 68 =
  19. 19.Double 24 =
  20. 20.Double 13 =
  21. 21.Double 91 =
  22. 22.Half of 44 =
  23. 23.Half of 46 =
  24. 24.Half of 136 =
  25. 25.Half of 94 =
  26. 26.Half of 22 =
  27. 27.Half of 72 =
  28. 28.Half of 148 =
  29. 29.Double 98 =
  30. 30.Double 54 =
  31. 31.Half of 182 =
  32. 32.Double 86 =
  33. 33.Half of 162 =
  34. 34.Double 89 =
  35. 35.Double 95 =
  36. 36.Double 28 =
  37. 37.Half of 118 =
  38. 38.Double 34 =
  39. 39.Half of 16 =
  40. 40.Half of 92 =

Answer key

  1. 102
  2. 156
  3. 58
  4. 27
  5. 76
  6. 31
  7. 94
  8. 116
  9. 142
  10. 166
  11. 110
  12. 34
  13. 42
  14. 33
  15. 62
  16. 12
  17. 128
  18. 136
  19. 48
  20. 26
  21. 182
  22. 22
  23. 23
  24. 68
  25. 47
  26. 11
  27. 36
  28. 74
  29. 196
  30. 108
  31. 91
  32. 172
  33. 81
  34. 178
  35. 190
  36. 56
  37. 59
  38. 68
  39. 8
  40. 46

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