[計量] 請教一題計量

看板GRE (GRE入學考試)作者 (sfss)時間17年前 (2008/07/29 18:19), 編輯推噓4(404)
留言8則, 4人參與, 最新討論串6/41 (看更多)
Mario bought equal numbers of 2 cent and 3 cent stamps. If the total cost the stamps was $1.00, what was the total number of stamps bought? 答案是:40 但是我怎麼算都只有20,麻煩請高手指導一下,謝!!! -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 118.169.76.25

07/29 18:22, , 1F
'total' number, x = 20 => 20 + 20 =
07/29 18:22, 1F

07/29 18:22, , 2F
40
07/29 18:22, 2F

07/29 18:31, , 3F
所以說2cent and 3cent為一組 而總共有
07/29 18:31, 3F

07/29 18:31, , 4F
兩組嗎?(equal number)
07/29 18:31, 4F

07/29 19:23, , 5F
不是...是說2cent和3cent買一樣多張~
07/29 19:23, 5F

07/29 19:23, , 6F
是問總數
07/29 19:23, 6F

07/29 19:46, , 7F
一不注意就上當了~
07/29 19:46, 7F

07/29 20:15, , 8F
暸改了!3Q
07/29 20:15, 8F
文章代碼(AID): #18ZkxA-b (GRE)
文章代碼(AID): #18ZkxA-b (GRE)