Question

Cứume zới mn (┬┬﹏┬┬)

Tính( 3/7x11/15 3/7x4/15): (15 6/11-14 6/11)

giúp mìn với nhak ^_^ camon nhó 

Answer 1

`( 3/7 xx 11/15  + 3/7 xx 4/15): (15xx 6/11-14 xx6/11)`

`=[ 3/7 xx (11/15 +4/15) ] : [6/11 xx (15-14)]`

`= [3/7 xx 15/15 ] : [6/11 xx 1]`

`= 3/7 : 6/11`

`=3/7xx 11/6 = 33 / 42 = 11/14`

 

Answer 2

(3/7x11/15+3/7x4/15): (15+6/11-14 6/11

=3/7 x (11/15+4/15):1 6/11

=3/7 x 1:17/11

=3/7:17/11

=3/7 x 11/17

=33/119

Answer 3

`( 3/7 xx 11/15 + 3/7 xx 4/15) : ( 15 + 6/11 - 14 + 6/11)`

\(=\left[\dfrac{3}{7}\times\left(\dfrac{11}{15}+\dfrac{4}{15}\right)\right]:\left(15\dfrac{6}{11}-14\dfrac{6}{11}\right)\)

\(=\left[\dfrac{3}{7}\times\dfrac{15}{15}\right]:\left[\left(15-14\right)+\left(\dfrac{6}{11}-\dfrac{6}{11}\right)\right]\)

\(=\left(\dfrac{3}{7}\times1\right):1\)

\(=\dfrac{3}{7}:1\)

\(=\dfrac{3}{7}\)

Answer 4