Question

помогите!!!!!!!дам 50 балов​

Answer 1

$\sqrt{1 \frac{21}{100} } - 5 \sqrt{0.04} = \sqrt{ \frac{121}{100} } - 5 \sqrt{0.04} = \sqrt{ \frac{11 {}^{2} }{10 {}^{2} } } - 5 \sqrt{ {0.2}^{2} } = \frac{11}{10 } - 5 \times 0.2 = 1.1 - 1 = 0.1$

$( - 3 \sqrt{2} ) {}^{2} = 9 \times 2 = 18$

$\sqrt{0.1} \times \sqrt{4.9} = \sqrt{0.1 \times 4.9} = \sqrt{0.49} = \sqrt{0.7 {}^{2} } = 0.7$

$\frac{ \sqrt{54} }{ \sqrt{1.5} } = \sqrt{ \frac{54 \times 2}{3} } = \sqrt{ \frac{18 \times 2}{1} } = \sqrt{36} = \sqrt{ {6}^{2} } = 6$