a) $$0{,}6 \cdot \sqrt{36} = 0{,}6 \cdot 6 = 3{,}6$$
б) $$-2{,}5 \cdot \sqrt{25} = -2{,}5 \cdot 5 = -12{,}5$$
в) $$\sqrt{0{,}49} + \sqrt{0{,}16} = 0{,}7 + 0{,}4 = 1{,}1$$
г) $$\sqrt{0{,}0036} + \sqrt{0{,}0025} = 0{,}06 + 0{,}05 = 0{,}11$$
д) $$\sqrt{0{,}01} - \sqrt{0{,}0001} = 0{,}1 - 0{,}01 = 0{,}09$$
е) $$\frac{1}{3} \sqrt{0{,}81} - 1 = \frac{1}{3} \cdot 0{,}9 - 1 = \frac{0{,}9}{3} - 1 = 0{,}3 - 1 = -0{,}7$$
ж) $$4 - 10 \sqrt{0{,}01} = 4 - 10 \cdot 0{,}1 = 4 - 1 = 3$$
з) $$\sqrt{0{,}64} - \sqrt{0{,}04} = 0{,}8 - 0{,}2 = 0{,}6$$