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Novosadov [1.4K]
3 years ago
7

m." id="TexFormula1" title="Problem:
Express 0.3\overline{2} as a fraction in simplest form." alt="Problem:
Express 0.3\overline{2} as a fraction in simplest form." align="absmiddle" class="latex-formula">
Mathematics
1 answer:
stiks02 [169]3 years ago
6 0
0.111...=\dfrac{1}{9};\ 0.222...=\dfrac{2}{9};\ 0.333...=\dfrac{3}{9}=\dfrac{1}{3};\\\\0.444...=\dfrac{4}{9};\ 0.555...=\dfrac{5}{9};\ ...

 
0.3\overline{2}=0.3222...=0.1+0.2222...=0.1+\dfrac{2}{9}=\dfrac{1}{10}+\dfrac{2}{9}=\dfrac{9}{90}+\dfrac{20}{90}=\dfrac{29}{90}

0.3\overline{2}=\dfrac{9}{20}

other method

x=0.32222...\ \ \ |\cdot10\\\\10x=3.222...\ \ \ \ |\cdot10\\\\100x=32.222...\\\\100x-10x=32.222...-3.222...\\\\90x=29\ \ \ \ |:90\\\\x=\dfrac{29}{90}
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