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수학동아 - 폴리매스
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[수학 정보] 농도문제 편법
Cantor 2019.11.19 05:42 조회 998
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페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

a% 소금물 bg과 c& 소금물 dg을 썪으면 농도는 a,c와의 차가 d:b 되는 수 입니다.(%)

d:b 입니다. d 다음 b.

햇갈리시면 안됩니다.

이거 중1 또는 중2문제 풀 때 아주 유용합니다.

 

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  •  
    집돌이 페렐만 Lv.9 2019.11.19 06:14

    오오옷!!!!

    댓글 작성하기 좋아요0 댓글수0
  •  
    21세기오일러 Lv.11 2019.11.19 06:22

    감사합니다. 증명도 해주시면 감사하겠습니다.

    댓글 작성하기 좋아요0 댓글수0
  •  
    조곰팅 Lv.5 2019.11.19 07:52

    그리고 아시는 분들은 아시겠지만 농도문제 교육과정에서 빠졌습니다...ㅋㅋㅋㅋ

    댓글 작성하기 좋아요1 댓글수3
    •  
      222 Lv.9 2019.11.20 06:05

      그럼 제가 힘들게 학원에서 일차방정식/부등식 활용에서 농도문제 풀었던 건 어쩌고요?

      좋아요0
    •  
      조곰팅 Lv.5 2019.11.20 06:30

      글게욬ㅋㅋㅋㅋ

      그래도 뭐 시험에서는 내시거나 그럴수도 있겠죠?

      (교육과정에서만 빠진거니까...)

      좋아요1
    •  
      s.pie Lv.6 2020.11.08 19:09

      네?

      지금 2015년 개정 교육과정으로 계속 공부하고 있잖아요.

      좋아요0
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