Hoặc

Cách phía trên là cách lớp 5 nhé

Ta có:\(\dfrac{1}{2}+\dfrac{1}{4}+\dfrac{1}{8}+\dfrac{1}{16}+\dfrac{1}{32}+\dfrac{1}{64}\)

     \(=\dfrac{32}{64}+\dfrac{16}{64}+\dfrac{8}{64}+\dfrac{4}{64}+\dfrac{2}{64}+\dfrac{1}{64}=\dfrac{63}{64}\)

Ta có:\(\dfrac{5083}{2431}=\dfrac{23}{11}\)

1/2 + 1/4 + 1/8 + 1/16 + 1/32 + 1/64

= 32/64 + 16/64 + 8/64 + 4/64 + 2/64 + 1/64

= 63/64

5083/2431 = 21/11

11/12=1/2 , 36/10=18/5 , 75/36 = 25/12 , 14/28 = 1/2 , 48/30 = 8/5

1/2;18/5;25/12;1/2;24/15

\(\dfrac{11}{22}\)=\(\dfrac{1}{2}\)

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

\(\dfrac{75}{36}\)=\(\dfrac{25}{12}\)

\(\dfrac{14}{28}\)=\(\dfrac{1}{2}\)

\(\dfrac{48}{30}\)=\(\dfrac{8}{5}\)

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

\(\frac{75}{36}=\frac{75:3}{36:3}=\frac{25}{12}\)

\(\frac{75}{300}=\frac{75:75}{300:75}=\frac{1}{4}\)

\(\frac{4}{100}=\frac{4:4}{100:4}=\frac{1}{25}\)

36/10=18/5

75/36=25/12

75/300=1/4

4/100=1/25

36/10 =18/5

75/36=75/36

75/300=15/60

4/100=1/25

k chị nha!

3 6 = 3 : 3 6 : 3 = 1 2

- 4 - 3 6 = - 4 - 3 3 2 = - 4 . - 3 3 = - 4 . - 27 = - 4 . 27 = - 108

\(\dfrac{5}{6}\)

5/6

5/6

\(\dfrac{21}{36}=\dfrac{21:3}{36:3}=\dfrac{7}{12}\)

\(\dfrac{21}{36}=\dfrac{21:3}{36:3}=\dfrac{7}{12}\)

HD 

tính  \(p^2\)rồi \(\Rightarrow\)p

đáp án p=18