Question

các bn giúp mk nhé

a ( 1/6 + 1/10 + 1/15 ) : ( 1/6 + 1/10 - 1/15)

b ( 1/2 - 1/3 + 1/4 - 1/5 ) : ( 1/4 - 1/5)

Answer 1

a (1/6 + 1/10 + 1/15) : (1/6 + 1/10 - 1/15)

= ( 5/30 + 3/30 + 2/30) : (5/30 + 3/30 - 2/30)

= 1/3 : 1/6 = 1/3 x 6/1 = 6/3 = 2

b (1/2 - 1/3 + 1/4 - 1/5) : (1/4 - 1/5)

= (1/2 - 1/3 + 1/4 - 1/5) : (1/4 - 1/5)

= 1/2 - 1/3 = 1/6

Answer 2

a)  

(1/6+1/10+1/15) : (1/6+1/10-1/15)

= (1/6+1/10): (1/6+1/10)

= 4/15:4/15

=1

~Hy

Answer 3

b)

(1/2-1/3 +1/4-1/5): (1/4-1/5)

= (1/2-1/3) :(1/4-1/5)

= 1/6:1

=1/6

~Hy