Question

calcule:

$\frac{1}{5} \times \frac{4}{8}$

$\frac{4}{3} \div \frac{1}{3}$

$\frac{4}{6} + \frac{3}{4}$
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Answer 1

1/5 . 4/8

= (1 . 4) / (5 . 8)

= 5/40 simplificável por 5

= 1/8

__________________________

4/3  /   1/3

= 4/3 . 3/1

= 12/3

= 4

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4/6 + 3/4

= (4 . 4 + 6 . 3) / (6 . 4)

= (16 + 18) / 24 todos são simplificáveis por 2

= (8 + 9) / 12

= 17/12

Answer 2

$\frac{1}{5} \times \frac{4}{8}=\it{\frac{4}{40}=\frac{1}{10}}$

$\frac{4}{3} \div \frac{1}{3}=\it{\frac{4}{\cancel3}. \cancel3=4}$

$\frac{4}{6} + \frac{3}{4}=\it{\frac{8+9}{12}=\frac{17}{12}}$