Question

efetue as divisoes
a) 2/5 : 2/3
b) 3/4 . 1/6
c) 2/7 . 7/6

alguém ajuda a é por favor ​

Answer 1

Resposta:

a) 2/5 : 2/3

$\frac{2}{5} \frac{2}{3}$

Aplicar as propriedade das frações

$\frac{2}{5} \frac{2}{3} = \frac{2 x 3}{5 x 2} \\\\Faca o cancelamento cruzado: 2\\=\frac{2 x 3}{5 x 2}$

= $\frac{3}{5}$ (Decimal: 0.6)

b) 3/4 . 1/6

$\frac{3}{4} x \frac{1}{6} \\\\\frac{3}{4} x \frac{1}{3 x 2} \\\\=\frac{1}{4} x \frac{1}{2} \\\\\frac{1}{4} x \frac{1}{2} = \frac{1 x 1}{4 x 2} \\\\=\frac{1 x 1}{4 x 2} \\\\\frac{1}{4 x 2} \\\\=\frac{1}{8} . (Decimal: 0.125)$

c) 2/7 . 7/6

Faça o cancelamento cruzado do fator comum 7:

$\frac{2 x 7}{7 x 6}$

$= \frac{2}{6} \\\\\\Eliminar o fator comum 2:\\\\=\frac{2}{2 x 3} \\\\\\=\frac{1}{3}$

= 1/3 ( Decimal: 0.33333....)