Question

Calcule as seguintes frações:
(a)1/3+2/3=

(b)2/7+4/7=

(c)4/8-1/7=

(d)1/4-5/4=

(e)1/3+1/4=

(f)1/9+1/5=

(g)2/3-1/2=

Mim ajude por favor

Answer 1

Resposta:

(a)1/3+2/3=

$\frac{1}{3} + \frac{2}{3} = \frac{3}{3} = 1$

(b)2/7+4/7=

$\frac{2}{7} + \frac{4}{7} = \frac{6}{7}$

(c)4/8-1/7=

$\frac{4}{8} - \frac{1}{7} = \frac{28 - 8}{56} = \frac{20}{56} = \frac{5}{14}$

(d)1/4-5/4=

$\frac{1}{4} - \frac{5}{4} = \frac{ - 4}{4} = - 1$

(e)1/3+1/4=

$\frac{1}{3} + \frac{1}{4} = \frac{4 + 3}{12} = \frac{7}{12}$

(f)1/9+1/5=

$\frac{1}{9} + \frac{1}{5} = \frac{5 + 9}{45} = \frac{14}{45}$

(g)2/3-1/2=

$\frac{2}{3} - \frac{1}{2} = \frac{4 - 3}{6} = \frac{1}{6}$