Question

Am nevoie pt maine Pls dau coroana

Answer 1

1.

a.

$\frac{3}{4}; \frac{3}{5}; \frac{3}{3} ; \frac{4}{3}; \frac{4}{4} ; \frac{4}{5}; \frac{5}{3}; \frac{5}{4}; \frac{5}{5}$

b.

$\frac{7}{4} ; \frac{8}{4} ; \frac{8}{7}$

b.

$\frac{7}{13} + \frac{5}{13}$

$\frac{7 + 5}{13}$

$\frac{12}{13}$

d.

$\frac{21}{6} - \frac{9}{6}$

$\frac{21 - 9}{6}$

$\frac{12}{6}$

$2$

2.

b.

$\frac{n + 1}{12} = \frac{5}{3}$

$3 \times (n + 1) = 60$

$n + 1 = 20$

$n = 20 - 1$

$n = 19$

c.

$\frac{61}{35} - \frac{2x}{35} = \frac{19}{35} + \frac{22}{35}$

$\frac{61}{35} - \frac{2x}{35} = - \frac{3}{35}$

$61 - 2x = - 3$

$- 2x = - 3 - 61$

$- 2x = - 64$

$x = 32$

3.

a.

$480 \times \frac{5}{100} = \frac{2400}{100} = 24 \\ lei \: \: reducerea$

$480 - 24 = 456 \: \: lei \: \: \: costa$