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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 364 · 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 79 =
  2. 2.Half of 142 =
  3. 3.Half of 18 =
  4. 4.Double 31 =
  5. 5.Double 23 =
  6. 6.Double 21 =
  7. 7.Double 27 =
  8. 8.Double 57 =
  9. 9.Double 43 =
  10. 10.Double 82 =
  11. 11.Half of 88 =
  12. 12.Double 46 =
  13. 13.Double 74 =
  14. 14.Double 81 =
  15. 15.Half of 62 =
  16. 16.Double 94 =
  17. 17.Half of 78 =
  18. 18.Half of 126 =
  19. 19.Double 99 =
  20. 20.Half of 54 =
  21. 21.Half of 196 =
  22. 22.Double 64 =
  23. 23.Double 67 =
  24. 24.Half of 52 =
  25. 25.Double 14 =
  26. 26.Half of 82 =
  27. 27.Double 24 =
  28. 28.Double 11 =
  29. 29.Half of 124 =
  30. 30.Half of 86 =
  31. 31.Double 86 =
  32. 32.Half of 152 =
  33. 33.Double 55 =
  34. 34.Double 78 =
  35. 35.Double 62 =
  36. 36.Half of 192 =
  37. 37.Double 51 =
  38. 38.Double 37 =
  39. 39.Double 54 =
  40. 40.Half of 84 =

Answer key

  1. 158
  2. 71
  3. 9
  4. 62
  5. 46
  6. 42
  7. 54
  8. 114
  9. 86
  10. 164
  11. 44
  12. 92
  13. 148
  14. 162
  15. 31
  16. 188
  17. 39
  18. 63
  19. 198
  20. 27
  21. 98
  22. 128
  23. 134
  24. 26
  25. 28
  26. 41
  27. 48
  28. 22
  29. 62
  30. 43
  31. 172
  32. 76
  33. 110
  34. 156
  35. 124
  36. 96
  37. 102
  38. 74
  39. 108
  40. 42

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