Question

Cele 3 puncte de la ex 11. Dar coroana + 5 stele. Repede va rog

Answer 1

a)

$2 \frac{1}{3} \times \sqrt{0.09} + 3 \frac{1}{2} \times \sqrt{0.04} - \frac{1}{6} \times \sqrt{0.36} \\ \\ = \frac{7}{3} \times \sqrt{ \frac{9}{100} } + \frac{7}{2} \times \frac{1}{25} - \frac{1}{6} \times \sqrt{ \frac{9}{25} } \\ \\ = \frac{7}{3} \times \frac{3}{10} + \frac{7}{50} - \frac{1}{6} \times \frac{3}{5} \\ \\ = \frac{7}{10} + \frac{7}{50} - \frac{1}{10} \\ \\ = \frac{35 + 7 - 5}{50} \\ \\ = \frac{37}{50}$

b)

$1 \frac{1}{4} \times \sqrt{0.0225} - 0.(3) \times \sqrt{0.81} + 0.2(7) \times \sqrt{0.0324} \\ \\ = \frac{5}{4} \times \frac{3}{20} - \frac{3}{9} \times \frac{9}{10} + \frac{5}{18} \times \frac{9}{50} \\ \\ = \frac{3}{16} - \frac{3}{10} + \frac{1}{20} \\ \\ = - \frac{5}{80} \\ \\ = - \frac{1}{16}$

c)

$2.(3) \times \sqrt{0.(1)} + \sqrt{ \frac{324}{25} } \div \sqrt{ \frac{81}{225} } - \sqrt{1024} \div \sqrt{64} \\ \\ = 2 \frac{3}{9} \times \frac{1}{3} + \frac{18}{5} \div \frac{9}{15} - 32 \div 8 \\ \\ = \frac{21}{9} \times \frac{1}{3} + \frac{18}{5} \times \frac{15}{9} - 4 \\ \\ = \frac{7}{9} + 6 - 4 \\ \\ = \frac{7 + 18}{9} \\ = \frac{25}{9}$