5/2 - 1/4 + 5/3

= 10/4 - 1/4 + 5/3

= 9/4 + 5/3

= 27/12 + 20/12

= 47/12

11/2 : 1/4 x 5/3

= 11/2 x 4/1 x 5/3

= 44/2 x 5/3

= 220/6

= 110/3

14/5 x 2/3 + 5

= 28/15 + 5

= 28/15 + 75/15

= 103/15

nhớ ghi cách giải nha mình tick luôn

Cách 1:

(1/4 + 2/3) x 4/5

= (3/12 + 8/12) x 4/5

= 11/12 x 4/5

= 44/60

= 11/15

Cách 2:

(1/4 + 2/3) x 4/5

= 1/4 x 4/5 + 2/3 x 4/5

= 4/20 + 8/15

=1/5 + 8/15

= 3/15 + 8/15

= 11/15

`(1/4+1/6)xx1/2`

`=(3/12+2/12)xx1/2`

`=5/12xx1/2`

`=5/24`

`(1/4+1/6)xx1/2`

`=1/4xx1/2+1/6xx1/2`

`=1/8+1/12`

`=3/24+2/24`

`=5/24`

nếu ko nhìn thấy dc thì ở đây nhé

a: =11/2*4*5/3

=22*5/3

=110/3

b: =30/12-3/12+20/12

=47/12

c: =28/15+5

=28/15+75/15

=103/15

diện tích hình bình hành là

\(\dfrac{3}{5}\times\dfrac{5}{3}\)=\(1\)

đáp số : 1

đầy đủ phần ngoặc hay gì đó

\(\dfrac{11}{2}\): \(\dfrac{1}{4}\) \(\times\) \(\dfrac{5}{3}\)

= \(\dfrac{11}{2}\) \(\times\) \(\dfrac{4}{1}\) \(\times\) \(\dfrac{5}{3}\)

= 22 \(\times\) \(\dfrac{5}{3}\)

= \(\dfrac{110}{3}\)

\(\dfrac{5}{2}-\dfrac{1}{4}+\dfrac{5}{3}\)

= \(\dfrac{30}{12}-\dfrac{3}{12}+\dfrac{20}{12}\)

= \(\dfrac{7}{12}\) 

\(\dfrac{14}{5}\times\dfrac{2}{3}\)+ 5

= \(\dfrac{28}{15}\) + 5

= \(\dfrac{28}{15}\) + \(\dfrac{75}{15}\)

= \(\dfrac{103}{15}\)

\(\dfrac{5}{7}+\dfrac{x}{35}=\dfrac{4}{5}\)
\(\dfrac{x}{35}=\dfrac{4}{5}-\dfrac{5}{7}\)
\(\dfrac{x}{35}=\dfrac{28}{35}-\dfrac{25}{35}\)
\(\dfrac{x}{35}=\dfrac{3}{35}\)
\(x=3\)

nhanh lên mọi ngừi ơi , mình đang vội

\(x\times\dfrac{3}{8}=4\)
\(x=4:\dfrac{3}{8}\)
\(x=4\times\dfrac{8}{3}\)
\(x=\dfrac{32}{3}\)

Còn a 7/8 x 4/21 = 5/14 x 6

B15/19;3/7;9/14 :3 tính giuap mình với

15/19=210/266

3/7=114/266

9/14=171/266

3=798/266

=>3/7<9/14<15/19<3

7/8*4/21=7/21*4/8=1/3*1/2=1/6

5/14*6=30/14=15/7

=>Đề sai rồi bạn