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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 345 · 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 63 =
  2. 2.Half of 32 =
  3. 3.Half of 138 =
  4. 4.Double 57 =
  5. 5.Half of 162 =
  6. 6.Double 29 =
  7. 7.Double 28 =
  8. 8.Double 61 =
  9. 9.Double 79 =
  10. 10.Half of 34 =
  11. 11.Half of 98 =
  12. 12.Double 58 =
  13. 13.Double 17 =
  14. 14.Double 78 =
  15. 15.Double 24 =
  16. 16.Half of 38 =
  17. 17.Double 54 =
  18. 18.Double 31 =
  19. 19.Half of 174 =
  20. 20.Double 15 =
  21. 21.Double 43 =
  22. 22.Half of 46 =
  23. 23.Half of 64 =
  24. 24.Half of 54 =
  25. 25.Double 13 =
  26. 26.Double 62 =
  27. 27.Double 93 =
  28. 28.Half of 122 =
  29. 29.Double 91 =
  30. 30.Double 18 =
  31. 31.Half of 192 =
  32. 32.Double 37 =
  33. 33.Double 95 =
  34. 34.Half of 94 =
  35. 35.Half of 56 =
  36. 36.Double 32 =
  37. 37.Double 89 =
  38. 38.Half of 18 =
  39. 39.Half of 52 =
  40. 40.Half of 42 =

Answer key

  1. 126
  2. 16
  3. 69
  4. 114
  5. 81
  6. 58
  7. 56
  8. 122
  9. 158
  10. 17
  11. 49
  12. 116
  13. 34
  14. 156
  15. 48
  16. 19
  17. 108
  18. 62
  19. 87
  20. 30
  21. 86
  22. 23
  23. 32
  24. 27
  25. 26
  26. 124
  27. 186
  28. 61
  29. 182
  30. 36
  31. 96
  32. 74
  33. 190
  34. 47
  35. 28
  36. 64
  37. 178
  38. 9
  39. 26
  40. 21

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