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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 628 · 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 91 =
  2. 2.Half of 144 =
  3. 3.Half of 98 =
  4. 4.Half of 42 =
  5. 5.Double 93 =
  6. 6.Half of 48 =
  7. 7.Half of 44 =
  8. 8.Double 82 =
  9. 9.Double 87 =
  10. 10.Half of 62 =
  11. 11.Double 88 =
  12. 12.Half of 152 =
  13. 13.Double 41 =
  14. 14.Half of 18 =
  15. 15.Half of 194 =
  16. 16.Half of 114 =
  17. 17.Double 99 =
  18. 18.Double 15 =
  19. 19.Double 62 =
  20. 20.Half of 78 =
  21. 21.Half of 12 =
  22. 22.Half of 134 =
  23. 23.Half of 26 =
  24. 24.Double 96 =
  25. 25.Double 51 =
  26. 26.Half of 74 =
  27. 27.Half of 142 =
  28. 28.Double 61 =
  29. 29.Double 29 =
  30. 30.Double 92 =
  31. 31.Half of 92 =
  32. 32.Half of 136 =
  33. 33.Double 85 =
  34. 34.Double 81 =
  35. 35.Double 66 =
  36. 36.Half of 188 =
  37. 37.Double 75 =
  38. 38.Half of 66 =
  39. 39.Half of 166 =
  40. 40.Double 55 =

Answer key

  1. 182
  2. 72
  3. 49
  4. 21
  5. 186
  6. 24
  7. 22
  8. 164
  9. 174
  10. 31
  11. 176
  12. 76
  13. 82
  14. 9
  15. 97
  16. 57
  17. 198
  18. 30
  19. 124
  20. 39
  21. 6
  22. 67
  23. 13
  24. 192
  25. 102
  26. 37
  27. 71
  28. 122
  29. 58
  30. 184
  31. 46
  32. 68
  33. 170
  34. 162
  35. 132
  36. 94
  37. 150
  38. 33
  39. 83
  40. 110

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