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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 178 · 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 36 =
  2. 2.Half of 74 =
  3. 3.Double 63 =
  4. 4.Double 31 =
  5. 5.Half of 142 =
  6. 6.Double 59 =
  7. 7.Double 56 =
  8. 8.Double 11 =
  9. 9.Double 92 =
  10. 10.Half of 68 =
  11. 11.Double 14 =
  12. 12.Double 48 =
  13. 13.Double 69 =
  14. 14.Half of 28 =
  15. 15.Double 65 =
  16. 16.Double 41 =
  17. 17.Half of 62 =
  18. 18.Half of 128 =
  19. 19.Half of 122 =
  20. 20.Double 12 =
  21. 21.Double 28 =
  22. 22.Half of 48 =
  23. 23.Half of 196 =
  24. 24.Half of 82 =
  25. 25.Double 62 =
  26. 26.Double 94 =
  27. 27.Double 84 =
  28. 28.Double 72 =
  29. 29.Half of 92 =
  30. 30.Half of 22 =
  31. 31.Half of 42 =
  32. 32.Half of 38 =
  33. 33.Half of 114 =
  34. 34.Half of 152 =
  35. 35.Half of 136 =
  36. 36.Double 81 =
  37. 37.Half of 198 =
  38. 38.Double 45 =
  39. 39.Double 89 =
  40. 40.Half of 78 =

Answer key

  1. 72
  2. 37
  3. 126
  4. 62
  5. 71
  6. 118
  7. 112
  8. 22
  9. 184
  10. 34
  11. 28
  12. 96
  13. 138
  14. 14
  15. 130
  16. 82
  17. 31
  18. 64
  19. 61
  20. 24
  21. 56
  22. 24
  23. 98
  24. 41
  25. 124
  26. 188
  27. 168
  28. 144
  29. 46
  30. 11
  31. 21
  32. 19
  33. 57
  34. 76
  35. 68
  36. 162
  37. 99
  38. 90
  39. 178
  40. 39

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