Question

urgent!!!!!!!!!!!!!!​

Answer 1

Explicație pas cu pas:

4.

$\frac{144}{169} \times ( \frac{13}{48} )$

$\frac{144 \times 13}{169 \times 48}$

$\frac{1872}{8112}$

reducem cu 624

$\frac{3}{13}$

5)

$\frac{-\frac{3}{4}+\frac{4}{7}-\frac{5}{28}}{2.8}$

$\frac{-\frac{3}{4}+\frac{4}{7}-\frac{5}{28}}{2.8}$

$\frac{-\frac{21}{28}+\frac{16}{28}-\frac{5}{28}}{2.8}$

$\frac{\frac{-21+16}{28}-\frac{5}{28}}{2.8}$

$\frac{-\frac{5}{28}-\frac{5}{28}}{2.8}$

$\frac{\frac{-5-5}{28}}{2.8}$

$\frac{\frac{-10}{28}}{2.8}$

reducem la 2

$\frac{-\frac{5}{14}}{2.8}$

exprimam prin fractie unica

$\frac{-5}{14\times 2.8}$

$\frac{-5}{39.2}$

inmultim cu 10

$\frac{-50}{392}$

reducem cu 2

$-\frac{25}{196}$