Question

quien me puede explicar esto: efectua las siguientes operaciones
a)-6/5+(-1/7)=
b)-5/8-(-15/8)=
c)8/3x(-9/6)x4/5=
d)7/5÷6/8=
e)9/7+10/6+(-5/3)=

Answer 1

Respuesta:

a) -6/5+(-1/7)= =((-6*7)+(-1*5))/(5*7)= -47/35

b) -5/8-(-15/8)= =((-5)-(-15))/(8)= =5/4

c) 8/3x(-9/6)x4/5=

$=8/3x*(-(3*\cancel{3})/(2*\cancel{3}))*1/5x^4=$

$=8/3x*(-3/2)*1/5x^4=$

$=(4x*\cancel{2/3})*(\cancel{3/2}*-1)*1/5x^4=$

$=-4x*1/5x^4=$

$=-4/5x^5$

d)7/5÷6/8=

$=7/5:(3*\cancel{2})/(4*\cancel{2})=$

$=7/5*4/3=$

$=28/15$