ai giúp mình với huhu

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

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

= 7/30: 1/5

= 7/30.5 = 7/6.

sai rồi bạn ơi!! 5+3+2 sao bằng 7 đc????

a: \(\left(\dfrac{1}{6}+\dfrac{1}{10}+\dfrac{1}{15}\right):\left(\dfrac{1}{6}+\dfrac{1}{10}-\dfrac{1}{15}\right)\)

\(=\dfrac{5+3+2}{30}:\dfrac{5+3-2}{30}\)

\(=\dfrac{10}{30}\cdot\dfrac{30}{6}\)

\(=\dfrac{10}{6}=\dfrac{5}{3}\)

b: \(\left(\dfrac{1}{2}-\dfrac{1}{3}+\dfrac{1}{4}-\dfrac{1}{5}\right):\left(\dfrac{1}{4}-\dfrac{1}{6}\right)\)

\(=\dfrac{30-20+15-12}{60}:\dfrac{3-2}{12}\)

\(=\dfrac{13}{60}\cdot\dfrac{12}{1}=\dfrac{13}{5}\)

\(\frac{\frac{1}{6}+\frac{1}{10}+\frac{1}{15}}{\frac{1}{6}+\frac{1}{10}-\frac{1}{15}}=\frac{\frac{5+3+2}{30}}{\frac{5+3-2}{30}}=\frac{\frac{1}{3}}{\frac{1}{5}}=1\frac{2}{3}\)

\(\frac{\frac{1}{2}-\frac{1}{3}+\frac{1}{4}-\frac{1}{5}}{\frac{1}{4}-\frac{1}{6}}=\frac{\frac{30-20+15-12}{60}}{\frac{3-2}{12}}=\frac{\frac{13}{60}}{\frac{1}{12}}=2\frac{3}{5}\)

tíc nha mn, mình đang bị âm điểm

thank you ban nha

2023 rồi còn ai ở đây ko ??? 😢😢😢

5/3

= 1/3 : 1/5 = 1/3 x 5 = 5/3

5\3

a) 43/20 + 17/6 : ( 150/240 + 210/240 )

=    43/20 + 17/6 :  360/240

=    43/20 + 17/6 : 3/2

=    43/20 + 34/18

=     774/360 + 612/360

=   1386/360

=  77/20

b)

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

=  10/30   :    0

=  1/3   :   0

=1/3

Đó là cách giải chi tiết va dễ hiểu nhất đó     ^ - ^

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

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

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

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

=10/30 : 5/30

=10/30 x 30/5

=2

!!! Hok tốt!!!

\(\left(\frac{1}{6}+\frac{1}{10}+\frac{1}{15}\right):\left(\frac{1}{6}+\frac{1}{10}-\frac{1}{15}\right)\)

=\(\frac{10}{30}:\frac{6}{30}\)

\(=\frac{5}{3}\)

\(\left(\frac{1}{6}+\frac{1}{10}+\frac{1}{15}\right):\left(\frac{1}{6}+\frac{1}{10}-\frac{1}{15}\right)\)

\(=\left(\frac{5}{30}+\frac{3}{30}+\frac{2}{30}\right):\left(\frac{5}{30}+\frac{3}{30}-\frac{2}{30}\right)\)

\(=\left(\frac{5+3+2}{30}\right):\left(\frac{5+3-2}{30}\right)\)

\(=\frac{8}{30}:\frac{6}{30}\)

\(=\frac{8}{30}\times\frac{30}{6}\)

\(=\frac{4}{1}\times\frac{1}{3}\)

\(=\frac{4}{3}\)

\(\dfrac{\left(\dfrac{5}{30}+\dfrac{3}{30}+\dfrac{2}{30}\right):\left(\dfrac{5}{30}+\dfrac{3}{30}-\dfrac{2}{30}\right)}{\left(\dfrac{30}{60}-\dfrac{20}{60}+\dfrac{15}{60}-\dfrac{12}{60}\right):\left(\dfrac{3}{12}-\dfrac{2}{12}\right)}=\dfrac{\dfrac{1}{3}:\dfrac{1}{5}}{\dfrac{13}{60}:\dfrac{1}{12}}=\dfrac{\dfrac{1}{3}\times5}{\dfrac{13}{60}\times12}=\dfrac{\dfrac{5}{3}}{\dfrac{13}{5}}=\dfrac{25}{39}\)

=\(\dfrac{\dfrac{1}{3}:\dfrac{1}{5}}{\dfrac{13}{60}:\dfrac{1}{12}}=\dfrac{\dfrac{5}{3}}{\dfrac{13}{5}}=\dfrac{25}{39}\)

25/39