Question

Determine os produtos simplificando o resultado, quando possivel a) 3.2/8 b) 2/6 . 4/9 = c) 18/5.2 1/4=​

Answer 1

Explicação passo a passo:

a) 3.2/8 = 6/8 = 3/4

b) 2/6 . 4/9 = 8/54 = 4/27

c) 18/5 . 21/4=​ 378/20 = 189/10

Answer 2

a)

$3 \times \frac{2}{8} = \frac{3 \times 2}{1 \times 8} = \frac{6}{8} \div \frac{2}{2} = \frac{3}{4}$

$b ) \frac{2}{6} \times \frac{4}{9} = \frac{2 \times 4}{6 \times 9} = \frac{8}{54} = \div \frac{2}{2} = \frac{4}{27}$

$c) \frac{18}{5} \times 2 \: \frac{1}{4} = \frac{18}{5} \times \frac{2 \times 4 + 1}{4} = \frac{18}{5} \times \frac{8 + 1}{4} = \frac{18}{5} \times \frac{9}{4} = \frac{18 \times 9}{5 \times 4} = \frac{162}{20} \div \frac{2}{2} = \frac{81}{10}$