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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 798 · 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.Half of 112 =
  2. 2.Double 93 =
  3. 3.Double 84 =
  4. 4.Half of 158 =
  5. 5.Half of 78 =
  6. 6.Double 79 =
  7. 7.Double 81 =
  8. 8.Half of 42 =
  9. 9.Double 62 =
  10. 10.Half of 104 =
  11. 11.Half of 152 =
  12. 12.Double 91 =
  13. 13.Half of 96 =
  14. 14.Half of 102 =
  15. 15.Double 51 =
  16. 16.Double 47 =
  17. 17.Half of 62 =
  18. 18.Double 12 =
  19. 19.Half of 136 =
  20. 20.Half of 18 =
  21. 21.Half of 122 =
  22. 22.Half of 176 =
  23. 23.Double 61 =
  24. 24.Half of 86 =
  25. 25.Double 45 =
  26. 26.Half of 26 =
  27. 27.Double 33 =
  28. 28.Half of 52 =
  29. 29.Double 26 =
  30. 30.Double 19 =
  31. 31.Half of 142 =
  32. 32.Double 42 =
  33. 33.Double 65 =
  34. 34.Half of 14 =
  35. 35.Double 57 =
  36. 36.Half of 24 =
  37. 37.Double 52 =
  38. 38.Half of 76 =
  39. 39.Double 17 =
  40. 40.Half of 178 =

Answer key

  1. 56
  2. 186
  3. 168
  4. 79
  5. 39
  6. 158
  7. 162
  8. 21
  9. 124
  10. 52
  11. 76
  12. 182
  13. 48
  14. 51
  15. 102
  16. 94
  17. 31
  18. 24
  19. 68
  20. 9
  21. 61
  22. 88
  23. 122
  24. 43
  25. 90
  26. 13
  27. 66
  28. 26
  29. 52
  30. 38
  31. 71
  32. 84
  33. 130
  34. 7
  35. 114
  36. 12
  37. 104
  38. 38
  39. 34
  40. 89

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