Question

calcule e simplifique:
a)3 1/5+3/8
b)2/4-1
c)4/2*3/5*4/8
d)2/7 de1 5/3
e)5/8 / 2/5
f)(3/8)²
g)raiz quadrada de 9/49

Answer 1

$a) 3 \frac{1}{5}+ \frac{3}{8}=$ 
$\frac{1}{5}+ \frac{3}{8}= \frac{8+15}{40}= \frac{23}{40}$
Então :3 1/5 + 3/8 = $3 \frac{23}{40}$

b) $\frac{2}{4}- 1= \frac{1}{2}-1= \frac{1-2}{2}= - \frac{1}{2}$

c) $\frac{4}{2}* \frac{3}{5}* \frac{4}{8}= simplificando,fica:$
    
  $2* \frac{3}{5}* \frac{1}{2}= \frac{6}{10}= \frac{3}{5}$

d) $\frac{2}{7}de1 \frac{5}{3}= \frac{2}{7}* \frac{8}{3}= \frac{16}{21}$

e) $\frac{ \frac{5}{8} }{ \frac{2}{5} }= \frac{5}{8}: \frac{2}{5}= \frac{5}{8}* \frac{5}{2}= \frac{25}{16} }=1 \frac{9}{16}$

f) $(\frac{3}{8})^2= \frac{9}{64}$

g) $\sqrt{ \frac{9}{49} }= \frac{ \sqrt{9} }{ \sqrt{49} }= \frac{3}{7}$