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Решите задачу:

$\sqrt{0.81 \times 625} - \sqrt{2 \frac{1}{4} } = 0.9 \times 25 - \sqrt{ \frac{9}{4} } = \frac{9 \times 25}{10} - \frac{3}{2} = \frac{45}{2} - \frac{3}{2} = \frac{42}{2} = 21$
$\sqrt{0.49 \times 225} - \sqrt{1 \frac{11}{25} } = 0.7 \times 15 - \sqrt{ \frac{36}{25} } = \frac{7 \times 15}{10} - \frac{6}{5} = \frac{21}{2} - \frac{6}{5} = 10.5 - 1.2 = 9.3$
$\sqrt{2 \frac{14}{121} \times \frac{4}{25} } - \sqrt{1} = \sqrt{ \frac{256}{121} } \times \frac{2}{5} - 1 = \frac{16 \times 2}{11 \times 5} - 1 = \frac{32}{55} - 1 = - \frac{23}{55}$
$\sqrt{ \frac{147}{48} } = \sqrt{ \frac{49}{16} } = \frac{7}{4} = 1 \frac{3}{4}$