Question

Alguem pra me ajudar a responder?​

Answer 1

Resposta:

a) $\frac{2}{3} +\frac{5}{3} = \frac{7}{3}$

b) $\frac{5}{2}-\frac{2}{3} = \frac{15-4}{6} = \frac{11}{6}$

c) $\frac{1}{3} .\frac{4}{7} =\frac{1.4}{3.7} =\frac{4}{21}$

d) $\frac{1}{4} :\frac{2}{3} = \frac{1}{4} .\frac{3}{2} =\frac{3}{8}$

e) $(\frac{2}{5})^2 = \frac{2^2}{5^2} =\frac{4}{25}$

f) $\sqrt{81} =\sqrt{9^2} =9$