<P><!--StartFragment--> <SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify">5학년 2학기 수학 8단원 수학 책 134쪽 밑에 있는 익히기 문제인데요.</SPAN> </P> <P style="FONT-SIZE: 10pt; MARGIN: 0px; COLOR: #000000; TEXT-INDENT: 0px; LINE-HEIGHT: 160%; FONT-FAMILY: '바탕'; TEXT-ALIGN: justify"><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify"><BR></SPAN></P> <P style="FONT-SIZE: 10pt; MARGIN: 0px; COLOR: #000000; TEXT-INDENT: 0px; LINE-HEIGHT: 160%; FONT-FAMILY: '바탕'; TEXT-ALIGN: justify"><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify">문제:양팔 저울에 올려놓아 무게를 잴 수 있는 분동이 3그램, 10그램,15그램짜리가 각각 2개씩 있습니다. 이 분동을 이용하여 잴수 있는 무게는 모두 몇가지 입니까?</SPAN><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify"></SPAN> </P> <P style="FONT-SIZE: 10pt; MARGIN: 0px; COLOR: #000000; TEXT-INDENT: 0px; LINE-HEIGHT: 160%; FONT-FAMILY: '바탕'; TEXT-ALIGN: justify"><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify"><BR></SPAN></P> <P style="FONT-SIZE: 10pt; MARGIN: 0px; COLOR: #000000; TEXT-INDENT: 0px; LINE-HEIGHT: 160%; FONT-FAMILY: '바탕'; TEXT-ALIGN: justify"><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify">이 문제에 대한 답으로 전과에는 다음과 같이 나와 있습니다.</SPAN><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify"></SPAN> </P> <P style="FONT-SIZE: 10pt; MARGIN: 0px; COLOR: #000000; TEXT-INDENT: 0px; LINE-HEIGHT: 160%; FONT-FAMILY: '바탕'; TEXT-ALIGN: justify"><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify"><BR></SPAN></P> <P style="FONT-SIZE: 10pt; MARGIN: 0px; COLOR: #000000; TEXT-INDENT: 0px; LINE-HEIGHT: 160%; FONT-FAMILY: '바탕'; TEXT-ALIGN: justify"><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify">●분동을 한 쪽에만 올려놓은 경우[`26가지`]</SPAN><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify"></SPAN> </P> <P style="FONT-SIZE: 10pt; MARGIN: 0px; COLOR: #000000; TEXT-INDENT: 0px; LINE-HEIGHT: 160%; FONT-FAMILY: '바탕'; TEXT-ALIGN: justify"><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify">추 1개: 3, 10, 15 *반점 생략!!!</SPAN> </P> <P style="FONT-SIZE: 10pt; MARGIN: 0px; COLOR: #000000; TEXT-INDENT: 0px; LINE-HEIGHT: 160%; FONT-FAMILY: '바탕'; TEXT-ALIGN: justify"><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify">추 2개: (3 3) , (3 10), (3 15), (10 10), (10 15), (15 15)</SPAN><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify"></SPAN> </P> <P style="FONT-SIZE: 10pt; MARGIN: 0px; COLOR: #000000; TEXT-INDENT: 0px; LINE-HEIGHT: 160%; FONT-FAMILY: '바탕'; TEXT-ALIGN: justify"><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify">추 3개: (3 3 10), (3 3 15), (10 10 3), (10 10 15), (15 15 3), (15 15 10), (3 10 15)</SPAN><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify"></SPAN> </P> <P style="FONT-SIZE: 10pt; MARGIN: 0px; COLOR: #000000; TEXT-INDENT: 0px; LINE-HEIGHT: 160%; FONT-FAMILY: '바탕'; TEXT-ALIGN: justify"><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify">추 4개: (3 3 10 10), (3 3 15 15), (10 10 15 15), (3 10 10 15), (3 10 15 15), (3 3 10 15)</SPAN><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify"></SPAN> </P> <P style="FONT-SIZE: 10pt; MARGIN: 0px; COLOR: #000000; TEXT-INDENT: 0px; LINE-HEIGHT: 160%; FONT-FAMILY: '바탕'; TEXT-ALIGN: justify"><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify">추 5개: (3 3 10 10 15), (3 3 10 15 15), (3 10 10 15 15)</SPAN><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify"></SPAN> </P> <P style="FONT-SIZE: 10pt; MARGIN: 0px; COLOR: #000000; TEXT-INDENT: 0px; LINE-HEIGHT: 160%; FONT-FAMILY: '바탕'; TEXT-ALIGN: justify"><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify">추 6개: (3 3 10 10 15 15)</SPAN><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify"></SPAN> </P> <P style="FONT-SIZE: 10pt; MARGIN: 0px; COLOR: #000000; TEXT-INDENT: 0px; LINE-HEIGHT: 160%; FONT-FAMILY: '바탕'; TEXT-ALIGN: justify"><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify"><BR></SPAN></P> <P style="FONT-SIZE: 10pt; MARGIN: 0px; COLOR: #000000; TEXT-INDENT: 0px; LINE-HEIGHT: 160%; FONT-FAMILY: '바탕'; TEXT-ALIGN: justify"><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify">●분동을 양쪽에 올려놓는 경우, 위의 경우에서 무게가 겹친것을 뺀 나머지 이므로</SPAN><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify"></SPAN> </P> <P style="FONT-SIZE: 10pt; MARGIN: 0px; COLOR: #000000; TEXT-INDENT: 0px; LINE-HEIGHT: 160%; FONT-FAMILY: '바탕'; TEXT-ALIGN: justify"><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify">1,2,4,5,7,8,9,11,12,14,17,19,22,24,27,29,32,34,37,44,47(g)의 21가지이다.</SPAN> </P> <P style="FONT-SIZE: 10pt; MARGIN: 0px; COLOR: #000000; TEXT-INDENT: 0px; LINE-HEIGHT: 160%; FONT-FAMILY: '바탕'; TEXT-ALIGN: justify"><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify">☆☆☆총 47가지이다.☆☆☆</SPAN><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify"></SPAN> </P> <P style="FONT-SIZE: 10pt; MARGIN: 0px; COLOR: #000000; TEXT-INDENT: 0px; LINE-HEIGHT: 160%; FONT-FAMILY: '바탕'; TEXT-ALIGN: justify"><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify"><BR></SPAN></P> <P style="FONT-SIZE: 10pt; MARGIN: 0px; COLOR: #000000; TEXT-INDENT: 0px; LINE-HEIGHT: 160%; FONT-FAMILY: '바탕'; TEXT-ALIGN: justify"><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify">그런데, </SPAN><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify; TEXT-DECORATION: underline">분동을 양쪽에 올려놓는 경우가 이해가 안됩니다.</SPAN> </P> <P style="FONT-SIZE: 10pt; MARGIN: 0px; COLOR: #000000; TEXT-INDENT: 0px; LINE-HEIGHT: 160%; FONT-FAMILY: '바탕'; TEXT-ALIGN: justify"><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify">한쪽에 3g 다른 한쪽에 13g(10+3)을 올려놓는다면 10g도 잴 수 있고,</SPAN><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify"></SPAN> </P> <P style="FONT-SIZE: 10pt; MARGIN: 0px; COLOR: #000000; TEXT-INDENT: 0px; LINE-HEIGHT: 160%; FONT-FAMILY: '바탕'; TEXT-ALIGN: justify"><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify">한쪽에 3g 다른 한쪽에 28g(10+15+3)을 올려놓는다면 25g도 잴 수 있다고 생각합니다.</SPAN><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify"></SPAN> </P> <P style="FONT-SIZE: 10pt; MARGIN: 0px; COLOR: #000000; TEXT-INDENT: 0px; LINE-HEIGHT: 160%; FONT-FAMILY: '바탕'; TEXT-ALIGN: justify"><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify">그런데, 왜 10g,25g은 답에 포함되어 있지 않은지 정말 궁금합니다.</SPAN><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify"></SPAN> </P> <P style="FONT-SIZE: 10pt; MARGIN: 0px; COLOR: #000000; TEXT-INDENT: 0px; LINE-HEIGHT: 160%; FONT-FAMILY: '바탕'; TEXT-ALIGN: justify"><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify">그리고, 분동을 양쪽에 올려놓는 경우에 대해 자세히 꼭 알려 주세요.</SPAN><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify"></SPAN> </P> <P style="FONT-SIZE: 10pt; MARGIN: 0px; COLOR: #000000; TEXT-INDENT: 0px; LINE-HEIGHT: 160%; FONT-FAMILY: '한컴바탕'; TEXT-ALIGN: justify"><SPAN style="FONT-SIZE: 10pt; COLOR: #000000; LINE-HEIGHT: 21px; FONT-FAMILY: '한컴바탕'; LETTER-SPACING: 0px; TEXT-ALIGN: justify"><BR></SPAN></P>
