Solve \({ \text{1}}\frac{4}{5} + 20 - 280 \div 25 = ?\)
\(8\frac{1}{5}\)
\(9\frac{1}{2}\)
\(11\frac{1}{2}\)
\(10\frac{3}{5}\)
\(12\frac{1}{5}\)
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1
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\(\sqrt {\frac{{4\frac{1}{7} - 2\frac{1}{4}}}{{3\frac{1}{2} + 1\frac{1}{7}}} \div \frac{1}{{2 + \frac{1}{{2 + \frac{1}{{5 - \frac{1}{5}}}}}}}} \) is equal to = ?
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2
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3
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4
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5
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6
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7
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8
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9
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10
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