Question

Calcule:

5/6•7/8=

4/3•7/12

13/20•10/9

2•2/5

1•5/22

7/12•600

Answer 1

Oi!

Multiplicaçãode frações:
$\boxed{ \frac{a}{b} \times \frac{x}{y} = \frac{ a \times x}{b \times y}}$

a)
$=\frac{5}{6} \times \frac{7}{8} \\ = \frac{5 \times 7}{6 \times 8} \\ \boxed{= \frac{35}{48}}$

b)
$= \frac{4}{3} \times \frac{7}{12} \\ = \frac{4 \times 7}{3 \times 2} \\ \boxed{= \frac{28}{6}}$

c)
$= \frac{13}{20} \times \frac{10}{9} \\ = \frac{13 \times 10}{20 \times 9} \\ \boxed{= \frac{130}{180}}$

d)
$= 2 \times \frac{2}{5} \\ = \frac{2}{1} \times \frac{2}{5} \\ = \frac{2 \times 2}{1 \times 5} \\ \boxed{= \frac{4}{5}}$

e)
$= 1 \times \frac{5}{22} \\ = \boxed{\frac{5}{22}}$

f)
$=\frac{7}{12} \times 600 \\ = \frac{7 \times 600}{12} \\ = \frac{4.200}{12}\\ \boxed{= 350}$

Bons estudos,