Question

Resolva: a) (-4/7) x (-7/9)= b) 1/2 x 4/5= c) (-5/2) ÷ (-1/2)= d) 4/7 + 2/7= e) 8/9 - 6/9=

Answer 1

Resposta:

a)

$\frac{ - 4}{7} \times \frac{ - 7}{9} = \frac{4}{9}$

b)

$\frac{1}{2} \times \frac{4}{5} = \frac{2}{5}$

c)

$\frac{ - 5}{2} \times \frac{ - 1}{2} = \frac{5}{4}$

d)

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

e)

$\frac{8}{9} - \frac{6}{9} = \frac{2}{9}$