2/3

4

\(\dfrac{13}{15}-\dfrac{1}{5}=\dfrac{13}{15}=\dfrac{3}{15}=\dfrac{10}{15}=\dfrac{2}{3}\)

\(\dfrac{7}{8}\times\dfrac{2}{7}=\dfrac{14}{56}=\dfrac{1}{4}\)

Ai bt câu trả lời thì giúp mik nhé , mik cần gấp.

a)17/7

b)y=0,4

Chúc e học giỏi

lx ảnh bạn ơi

program Tong_Phan_So;

var

     tu_so1, mau_so1, tu_so2, mau_so2, tu_so_tong, mau_so_tong, ucln: integer;

begin

     write('Nhap tu so phan so 1: ');

     readln(tu_so1);

     write('Nhap mau so phan so 1: ');

     readln(mau_so1);

     write('Nhap tu so phan so 2: ');

     readln(tu_so2);

     write('Nhap mau so phan so 2: ');

     readln(mau_so2);

     tu_so_tong := tu_so1 * mau_so2 + tu_so2 * mau_so1;

     mau_so_tong := mau_so1 * mau_so2;

     ucln := gcd(tu_so_tong, mau_so_tong);

     tu_so_tong := tu_so_tong div ucln;

     mau_so_tong := mau_so_tong div ucln;

     writeln('Tong hai phan so la: ', tu_so_tong, '/', mau_so_tong);

end.

8 : 16/23 = 8 × 23 : 16

= 23/2

92/3

\(\frac{7}{15}+\frac{2}{10}=\frac{14}{30}+\frac{6}{30}=\frac{20}{30}=\frac{2}{3}\)

\(\frac{8}{3}+\frac{4}{3}=\frac{12}{3}=\frac{4}{1}=4\)

a, \(\frac{7}{15}+\frac{2}{10}=\frac{2}{3}\)

b,\(\frac{8}{3}+\frac{4}{3}=4\)

\(\frac{7}{15}\)\(+\frac{2}{10}\)\(=\frac{2}{3}\)

\(\frac{8}{3}\)\(+\frac{4}{3}\)\(=4\)

\(\frac{1}{2}\times\frac{2}{3}\times\frac{3}{4}\)

\(=\frac{1\times2\times3}{2\times3\times4}\)

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

1/2 x 2/3 x 3/4 = 1/3 x 3/4 = 1/4

hok tốt

1/2 . 2/3 . 3/4

= 1/3 . 3/4

= 1/4

\(\frac{1}{99}=0,\left(01\right)\)

\(\Rightarrow0,\left(18\right)=\frac{18}{99}\)

\(\Rightarrow2,\left(18\right)=2+\frac{18}{99}=\frac{24}{11}\)

2,18=\(\frac{218}{100}\)=\(\frac{109}{50}\)