dễ vậy em tự làm đi

E ko nhớ cách làm

a, 7/15=1/3+2/15

b,13/27=4/9+1/27

\(a,\)

\(\frac{7}{15}=\frac{14}{30}=\frac{8}{30}+\frac{6}{30}=\frac{4}{15}+\frac{1}{5}\)

\(b,\)

\(\frac{13}{27}=\frac{26}{54}=\frac{12}{54}+\frac{14}{54}=\frac{2}{9}+\frac{7}{27}\)

ps chưa tối giản là 143/253

a: \(\dfrac{19}{8}=2.375\)

b: \(\dfrac{1}{160}=0.00625\)

19/8 =19 . 125 / 8 . 125 = 2375/1000
1/160 = 1 . 625 / 160 . 625 = 625/100000

\(\dfrac{14}{21}=\dfrac{14:7}{21:7}=\dfrac{2}{3}=\dfrac{1}{3}+\dfrac{1}{3}\)

\(\dfrac{15}{29}=\dfrac{1+14}{29}=\dfrac{1}{29}+\dfrac{14}{29}\)

\(\dfrac{9}{35}=\dfrac{1+8}{35}=\dfrac{1}{35}+\dfrac{8}{35}\)

\(\dfrac{16}{27}=\dfrac{2+14}{27}=\dfrac{2}{27}+\dfrac{14}{27}\)

thank

`41/6`

41/6

PS tối giản là \(\dfrac{41}{6}\)

Bài 1: a) 0,32 = \(\frac{32}{100}=\frac{8}{25}\)

b) -0,124 = \(\frac{-124}{1000}=\frac{-31}{250}\)

c) 1,28 = \(\frac{128}{100}=\frac{32}{25}\)

d) -3,12 = \(\frac{-312}{100}=\frac{-78}{25}\)

Bài 2: \(\frac{1}{99}=0,\left(01\right)\)

\(\frac{1}{999}=0,\left(001\right)\)

1)a)0,32=\(\frac{8}{25}\)                         c)1,28=\(\frac{32}{25}\)

b)-0,124=\(\frac{-31}{250}\)                   d)-3,12=\(\frac{-78}{25}\)

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

\(\frac{1}{999}=0,\left(001\right)\)

\(1,\)

\(a.\)

\(0,32=\frac{32}{100}=\frac{8}{25}\)

\(b.\)

\(-0,124=\frac{-124}{1000}=-\frac{31}{250}\)

\(c.\)

\(1,28=\frac{128}{100}=\frac{32}{25}\)

\(d.\)

\(-3,12=-\frac{312}{100}=\frac{78}{25}\)

\(2,\)

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

\(\frac{1}{999}=1,\left(001\right)\)