2. 职称英语
  3. Juan walked 3 more miles than Rebecca. Rebecca walked 4 times as far as William.

Juan walked 3 more miles than Rebecca. Rebecca walked 4 times as far as William.

游客2025-02-24  27
问题 Juan walked 3 more miles than Rebecca. Rebecca walked 4 times as far as William. William walked 2 miles. Which of the following mathematical expressions is equivalent to the number of miles Juan walked?
   ______3×4×2
   ______(2+4)×3
   ______4(2)+3
   ______4+3+2
选项
答案  To solve this problem, start with William and work backward. William walked 2 miles, and Rebecca walked 4 times as far as William. Therefore, Rebecca walked 4(2) miles. Juan walked 3 more miles than Rebecca, so Juan walked [4(2)+3] miles.
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