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3 years ago

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7B2%7D%7B5%7D%20%20%3D%20" id="TexFormula1" title="(3 \frac{2}{5} - 1 \frac{3}{10} ) \div 1 \frac{2}{5} = " alt="(3 \frac{2}{5} - 1 \frac{3}{10} ) \div 1 \frac{2}{5} = " align="absmiddle" class="latex-formula">

1 answer:

nata0808 [166]3 years ago

7 0

Answer:

$\frac{3}{2}$

Step-by-step explanation:

$[\frac{2}{5}-\frac{3}{10}+(3-1)]\div 1\frac{2}{5}\\\\=(\frac{4}{10}-\frac{3}{10}+2)\div\frac{5+2}{5}\\\\=(\frac{1}{10}+2)\div \frac{7}{5}\\\\=(\frac{2\cdot10+1}{10})\div \frac{7}{5}\\\\=\frac{21}{10}\div \frac{7}{5}\\\\=\frac{21}{10}\times \frac{5}{7}\\\\=\frac{21\cdot5}{10\cdot7}\\\\=\frac{3}{2}$

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