Question

Tính:

a)\(\sqrt{0,36}+\sqrt{49}\)

b)\(\sqrt{\frac{4}{9}}-\sqrt{\frac{25}{36}}\)

c)\(\sqrt{\frac{25}{64}}+\sqrt{1,69}-\sqrt{\left(-9\right)^2}+\sqrt{\left(-5\right)^4}\)

d)\(\sqrt{0,2^2}\)

e)\(\sqrt{\left(-0,3\right)^2}\)

g)\(-\sqrt{\left(-1,3\right)^2}\)

h)\(-0,7\sqrt{\left(-0,7\right)^2}\)

Answer 1

c) \(\frac{5}{8}+\frac{13}{10}-9+25=\frac{717}{40}\)

d) \(\sqrt{0,2^2}=\left|0,2\right|=0,2\)

e) \(\sqrt{\left(-0.3\right)^2}=0,3\)

Answer 2

a) 0,6+7=7,6

b) \(\frac{2}{3}-\frac{5}{6}=\frac{-1}{6}\)

Answer 3

g) \(-\sqrt{\left(-1.3\right)^2}=-1,3\)

h) \(-0,7\sqrt{\left(-0,7\right)^2}=-0,49\)