Question

Calcule: A) 1/2-3/4+7 B) 3/5+1/2-5/3 C) 7/4-6/8 D) 1/4+1/6-1/9 E) 6/3+1/7 F) 5+6/5-1/9 Gente esses tracos significa "Sobre" Por favor Me Ajudem!

Answer 1

A) $\frac{1}{2} - \frac{3}{4} + 7$

$\frac{1*2 - 3*1}{4} + 7$

$\frac{-1}{4} + 7$

$\frac{-1*1 + 7* 4}{4}$

$\frac{27}{4}$

B) $\frac{3}{5} + \frac{1}{2} - \frac{5}{3}$

$\frac{3*2 + 1*5}{10} - \frac{5}{3}$

$\frac{11}{10} - \frac{5}{3}$

$\frac{11*3 - 5* 10}{30}$

$\frac{-17}{30}$

C) $\frac{7}{4} - \frac{6}{8}$

$\frac{7*2 - 6}{8}$

$\frac{8}{8} = 1$

D) $\frac{1}{4} + \frac{1}{6} - \frac{1}{9}$

$\frac{1*9 + 1*6 + 1*4}{36}$

$\frac{19}{36}$

E) $\frac{6}{3} + \frac{1}{7}$

$\frac{18 + 3}{21}$

$\frac{21}{21} = 1$

F) $5 + \frac{6}{5} - \frac{1}{9}$

$\frac{6*9 - 1*5}{45} = \frac{49}{45}$

5 + $\frac{49}{45}$ = $\frac{45*5 + 49 }{45}$ 

$\frac{274}{45}$