Question

Qual o resultado:
7/5+2/3
8/3-2/7
5/6×8/9
7/1÷6/8

Answer 1

7/5 + 2/3 achando mmc
$\frac{7}{5} + \frac{2}{3} = \frac{7x3+2x5}{5x3}= \frac{21+10}{15} = \frac{31}{15}$

$\frac{8}{3} - \frac{2}{7} = \frac{8x7-3x2}{7x3}= \frac{56-6}{21} = \frac{50}{21}$

$\frac{5}{6} x \frac{8}{9}= \frac{5x8}{6x9} = \frac{40}{54}$

7/1÷6/8 invertemos a segunda fracao para que seja multiplicao
7/1÷6/8=7/1x8/6=7x8/6=56/6=28/3