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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 714 · 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 35 =
  2. 2.Double 67 =
  3. 3.Half of 16 =
  4. 4.Half of 156 =
  5. 5.Double 28 =
  6. 6.Double 43 =
  7. 7.Double 25 =
  8. 8.Half of 22 =
  9. 9.Double 18 =
  10. 10.Half of 172 =
  11. 11.Half of 78 =
  12. 12.Half of 184 =
  13. 13.Double 34 =
  14. 14.Half of 36 =
  15. 15.Double 92 =
  16. 16.Double 27 =
  17. 17.Double 39 =
  18. 18.Half of 74 =
  19. 19.Double 88 =
  20. 20.Half of 188 =
  21. 21.Double 81 =
  22. 22.Double 79 =
  23. 23.Double 63 =
  24. 24.Double 29 =
  25. 25.Half of 102 =
  26. 26.Double 86 =
  27. 27.Half of 96 =
  28. 28.Half of 26 =
  29. 29.Double 31 =
  30. 30.Double 49 =
  31. 31.Half of 114 =
  32. 32.Double 74 =
  33. 33.Double 64 =
  34. 34.Half of 92 =
  35. 35.Half of 48 =
  36. 36.Double 77 =
  37. 37.Double 91 =
  38. 38.Half of 54 =
  39. 39.Half of 122 =
  40. 40.Double 21 =

Answer key

  1. 70
  2. 134
  3. 8
  4. 78
  5. 56
  6. 86
  7. 50
  8. 11
  9. 36
  10. 86
  11. 39
  12. 92
  13. 68
  14. 18
  15. 184
  16. 54
  17. 78
  18. 37
  19. 176
  20. 94
  21. 162
  22. 158
  23. 126
  24. 58
  25. 51
  26. 172
  27. 48
  28. 13
  29. 62
  30. 98
  31. 57
  32. 148
  33. 128
  34. 46
  35. 24
  36. 154
  37. 182
  38. 27
  39. 61
  40. 42

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