Rút gọn P/S : \(\frac{81}{54}\)

\(\frac{81}{54}=\frac{81:9}{54:9}=\frac{9}{6}=\frac{9:3}{6:3}=\frac{3}{2}\)

@Trunglaai?

là = 3/2

3/4

3/4

3/4

\(\dfrac{70}{5}=\dfrac{70\div5}{5\div5}=14\)

= 70 : 5 , 5: 5

= 14/1

=14

\(\dfrac{70}{5}\)=14(lấy tử chia mẫu)

3/5

\(\dfrac{12}{20}=\dfrac{12:4}{20:4}=\dfrac{3}{5}\)

12/20=3/5

a: \(=\left|4-3\sqrt{2}\right|=3\sqrt{2}-4\)

b: \(\sqrt{\left(2+\sqrt{5}\right)^2}=\left|\sqrt{5}+2\right|=\sqrt{5}+2\)

c: \(\sqrt{\left(4+\sqrt{2}\right)^2}=\left|4+\sqrt{2}\right|=4+\sqrt{2}\)

d: \(\sqrt{\left(2-\sqrt{3}\right)^2}=\left|2-\sqrt{3}\right|=2-\sqrt{3}\)

\(\dfrac{12}{13}\times\dfrac{13}{15}=\dfrac{12}{15}=\dfrac{4}{5}\)

`12/13+13/15` đề ntn phải ko ạ?

`=180/195+169/195`

`=349/195`

\(\dfrac{12}{15}\) ( triệt tiêu phần giống nhau là 13 )

14/24 : 2 = 7/12

10/36 : 2 = 5/18

\(\dfrac{5}{27}=\dfrac{5}{27}\)

\(\dfrac{14}{24}=\dfrac{14:2}{24:2}=\dfrac{7}{12}\)

\(\dfrac{10}{36}=\dfrac{10:2}{36:2}=\dfrac{5}{18}\)

5/27 = 0.(185)

14/24 = 7/12

10/36 = 5/18

giúp mình với mọi người ơi

\(\dfrac{8}{24}-\dfrac{5}{25}=\dfrac{1}{3}-\dfrac{1}{5}=\dfrac{5}{15}-\dfrac{3}{15}=\dfrac{2}{15}\\ \dfrac{18}{21}-\dfrac{12}{27}=\dfrac{6}{7}-\dfrac{4}{9}=\dfrac{54}{63}-\dfrac{28}{63}=\dfrac{26}{63}\)

1/3-1/5= 2/15

6/7-4/9= 26/63