Question

Допоможіть вирішити ці вирази :

$0.5 \sqrt{1600} - \frac{1}{3} \sqrt{36}$
$\sqrt{0.25 \times 81}$
$\sqrt{{6}^{2} } \times 2^{8}$
$\sqrt{20} \times \sqrt{5} - \frac{ \sqrt{63} }{ \sqrt{7} }$
​

Answer 1

$0.5 \sqrt{1600} - \frac{1}{3} \times \sqrt{36} = 0.5 \times 40 - \frac{1}{3} \times 6 = 20 - 2 = 18$

$\sqrt{0.25 \times 81} = \sqrt{20.25} = \sqrt{ \frac{81}{4} } = \frac{9}{2}$

$\sqrt{6^{2} \times 2^{8} } = 6 \times 2^{4} =6 \times 16 = 96$

$\sqrt{20} \sqrt{5} - \frac{ \sqrt{63} }{ \sqrt{7} } = \sqrt{100} - \sqrt{9} = 10 - 3 = 7$