PETS/SAT (0018)
来源:百度知道 编辑:UC知道 时间:2024/05/29 15:43:17
At a music store, the price of a CD is three times the price of a cassette tape.
If 40 CDs were sold for a total of $480,
and the combined sales of CDs and cassette tapes totaled $600,
how many cassette tapes were sold ?
If 40 CDs were sold for a total of $480,
and the combined sales of CDs and cassette tapes totaled $600,
how many cassette tapes were sold ?
在音乐店里,一张光盘的价格是一个盒式录音带的三倍。
如果 40 张光盘卖了 $480,光盘加盒式录音带卖了 $600,总共卖了多少个盒式录音带?
第一步:先找出一张光盘的价格
480/40 = 12 (一张光盘卖 $12)
第二步:用以上答案来找出一个盒式录音带的价格
12/3 = 4 (一个盒式录音带要卖 $4)
第三步:找出所有的盒式录音带总共卖了多少钱
600-480 = 120 (所有的盒式录音带卖了 $120)
第四步:找出总共卖了几个盒式录音带
120/4 = 30 (总共卖了30个盒式录音带)
答案就是 30 个。