Question

efetue as adições e substituição

a)(+3/5) +(+1/2)

b)(+2/3)+(+5/4)

c)(-4/9)+(+2/3)

d)(+1/5)+(+3/5)

OBS:PRECISO DA CONTA PFV :(

Answer 1

a

$\frac{+3}{5} +\frac{+1}{2}$

ai faz o mmc

$\frac{6+5}{10}= \frac{11}{10}$

b

$\frac{2}{3} +\frac{5}{4}=\frac{8+5}{12}=\frac{23}{12}$

C

$\frac{(-4)}{9}+\frac{2}{3}=\frac{-4+6}{9}=\frac{2}{9}$

d

$\frac{1}{5} +\frac{3}{5} =\frac{1+3}{5}=\frac{4}{5}$