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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 545 · 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 132 =
  2. 2.Double 73 =
  3. 3.Half of 102 =
  4. 4.Half of 34 =
  5. 5.Double 27 =
  6. 6.Half of 138 =
  7. 7.Double 88 =
  8. 8.Double 79 =
  9. 9.Double 91 =
  10. 10.Half of 142 =
  11. 11.Half of 56 =
  12. 12.Double 62 =
  13. 13.Double 11 =
  14. 14.Double 34 =
  15. 15.Double 28 =
  16. 16.Double 95 =
  17. 17.Half of 108 =
  18. 18.Half of 158 =
  19. 19.Half of 26 =
  20. 20.Double 99 =
  21. 21.Half of 42 =
  22. 22.Double 68 =
  23. 23.Half of 148 =
  24. 24.Half of 188 =
  25. 25.Half of 112 =
  26. 26.Half of 122 =
  27. 27.Double 64 =
  28. 28.Double 78 =
  29. 29.Half of 72 =
  30. 30.Double 45 =
  31. 31.Half of 164 =
  32. 32.Half of 96 =
  33. 33.Double 52 =
  34. 34.Double 21 =
  35. 35.Half of 36 =
  36. 36.Double 31 =
  37. 37.Half of 32 =
  38. 38.Double 26 =
  39. 39.Double 85 =
  40. 40.Half of 168 =

Answer key

  1. 66
  2. 146
  3. 51
  4. 17
  5. 54
  6. 69
  7. 176
  8. 158
  9. 182
  10. 71
  11. 28
  12. 124
  13. 22
  14. 68
  15. 56
  16. 190
  17. 54
  18. 79
  19. 13
  20. 198
  21. 21
  22. 136
  23. 74
  24. 94
  25. 56
  26. 61
  27. 128
  28. 156
  29. 36
  30. 90
  31. 82
  32. 48
  33. 104
  34. 42
  35. 18
  36. 62
  37. 16
  38. 52
  39. 170
  40. 84

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