方法一：假設(shè)她8道題全答對(duì)了
（8×10－64）÷（10+6）
=16÷16
=1（道）
8-1=7（道）
方法二：設(shè)答對(duì)了x道,則答錯(cuò)了(8-x)道
10x-6(8-x)=64
10x-48+6x =64
16x =112
x =7
答：答對(duì)了7道題.
答對(duì)一道題加十分,答錯(cuò)一題扣六分,她搶答了八道題,結(jié)果得分六十四分,問答對(duì)了幾道題?
答對(duì)一道題加十分,答錯(cuò)一題扣六分,她搶答了八道題,結(jié)果得分六十四分,問答對(duì)了幾道題?
數(shù)學(xué)人氣：504 ℃時(shí)間：2020-03-15 18:11:07
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