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%% �������@�������當�����͂��܂�܂��@������
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  \begin{center}
    \Large\bf $2$�N~���̌v�Z
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    \underline{\hspace{1cm}}�N\underline{\hspace{1cm}}�g\underline{\hspace{1cm}}��
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%\vspace{-4zw}
%{\small{\begin{tabular}{l@{}p{26zw}}
%�����ӁD& ���v�Z���Ƃ��鏊�͕K�����������߂�܂ł̍l�����܂��͎����L�����邱�ƁB\\
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%%������}
\begin{enumerate}
\item ���̕���\fbox{~~~�@~~~}~�ɂ��Ă͂܂錾�t�������Ȃ����B

\begin{enumerate}
\item ���╶�����������킹���`�̎���\,\fbox{~\ajMaru{1}~}\,�Ƃ����C\,\fbox{~\ajMaru{1}~}\,�̘a�̌`�ŕ\���ꂽ����\,\fbox{~\ajMaru{2}~}\,�Ƃ����B
�܂��������̍���\,\fbox{~\ajMaru{3}~}\,�Ƃ����B

\item ���̒��ŁC�����̕������܂������������𓯗ލ��Ƃ����B���ލ��́C\fbox{~\ajMaru{4}~}\,���g����$1$�̍��ɂ܂Ƃ߂邱�Ƃ��ł���B

\end{enumerate}

\vspace{2mm}
\hspace{-7mm}
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 & \hspace{35mm} & & \hspace{35mm} \\[-8pt]
$\>$\ajMaru{1}$\>$ & {\color{white}{�P����}} & $\>$\ajMaru{2}$\>$ & {\color{white}{������}} \\[-8pt]
 & & &  \\
\hline
 & ~~~~~~~~ & & ~~~~~~~~ \\[-8pt]
\ajMaru{3} & {\color{white}{�萔��}} & \ajMaru{4} & {\color{white}{���z�@��}} \\[-8pt]
 & & &  \\
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\vspace{1mm}
\item ���̌v�Z�����Ȃ����B
\begin{enumerate}
\item $3a-4b-7a+2b$

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\item $(-6x^2+5x-7)+(3x^2-5x)$

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\item $(2x+4y)-(-5x+3y)$

{\color{white}{$=2x+4y+5x-3y$}}

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\item $2(6a-5b+1)$

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\item $3(a-2b)-2(a+5b)$ 

{\color{white}{$=3a-6b-2a-10b$}}

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\item $\dfrac{\,x+3y\,}{4}-\dfrac{\,3x-y\,}{6}$

{\color{white}{$=\dfrac{3(x+3y)-2(3x-y)}{12}$}}

{\color{white}{$=\dfrac{3x+9y-6x+2y}{12}$}}

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\item $(-6x)\times 3y$

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\item $2a^2\times 4a$

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\item $10x^2y\div (-2xy)$

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\item $12a^2b\times (-3ab)\div 9ab^2$

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\end{enumerate}

\newpage

\item $x=3$�C$y=-4$�̂Ƃ��C���̎��̒l�����߂Ȃ����B
\begin{enumerate}

\item $3(2x-3y)-4(x-2y)$

{\color{white}{$=6x-9y-4x+8y$}}

{\color{white}{$=2x-y$}}

{\color{white}{$=2\times 3-(-4)$}}

\vspace{-7mm}
\LINEK{10}

\item $-15x^2y\div 3x$

{\color{white}{$=-5xy$}}

{\color{white}{$=-5\times 3\times (-4)$}}

\vspace{-7mm}
\LINEK{60}

\end{enumerate}

\item ���̓�����[~~~]���̕����ɂ��ĉ����Ȃ����B

\begin{enumerate}

\item $3x+4y=8~~~~~[~y~]$

{\color{white}{$4y=8-3x$}}

\vspace{-7mm}
\LINEK{y=\dfrac{8-3x}{4}}

\item $V=\dfrac{1}{~3~}Sh~~~~~[~h~]$

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{\color{white}{$3V=Sh$}}

{\color{white}{$Sh=3V$}}

\vspace{-7mm}
\LINEK{h=\dfrac{\,3V\,}{S}}

\end{enumerate}

\item $1,\,3,\,5$�̂悤�ȘA������$3$�̊�̘a��$3$�̔{���ł��邱�Ƃ��C�������g���Đ������Ȃ����B

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\multicolumn{2}{l@{}}{\color{white}{\,�A������$3$�̊��$n$�𐮐��Ƃ����}} \\
\multicolumn{2}{l@{}}{\color{white}{\,$2n+1,\,2n+3,\,2n+5$�ƂȂ�B}} \\
& \color{white}{$(2n+1)+(2n+3)+(2n+5)$} \\
\color{white}{\,$=$\,} & \color{white}{$2n+1+2n+3+2n+5$} \\
\color{white}{\,$=$\,} & \color{white}{$6n+9$} \\
\color{white}{\,$=$\,} & \color{white}{$3(2n+3)$} \\
\multicolumn{2}{l@{}}{\color{white}{\,$n$�͐����Ȃ̂�$2n+3$�͐����ł���B}} \\
\multicolumn{2}{l@{}}{\color{white}{\,����ĘA������$3$�̊�̘a��$3$�̔{���ł���B~~~~~~}} \\
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\hline
\end{tabular}

\item �A���L���f�X($\mathrm{BC}287-\mathrm{BC}212$)�͋��̑̐ςƕ\�ʐς����������܂Ȃ����͂މ~����$\dfrac{2}{\,3\,}$�ł��邱�Ƃ��ؖ����܂����B
���̂��Ƃ��狅�̔��a��$r$�Ƃ��āC���̑̐�($V$)�C�\�ʐ�($S$)��\�����������߂Ȃ����B

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\end{enumerate}

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