chịu thua luôn 

easy vãi loz

\(\frac{1999999999}{9999999995}=\frac{1999999999:1999999999}{9999999995:1999999999}=\frac{1}{5}\)

1999999999/9999999995=1/5

1/5 nha

=2.000000009

1/5 đấy nhé

\(\frac{121212}{424242}\)

= \(\frac{12.10101}{42.10101}\)

rút gọn

= \(1\)

\(\frac{121212}{424242}=\frac{121212:60606}{424242:60606}=\frac{2}{7}\)

Ta có : \(\frac{121212}{424242}\)= \(\frac{121212:60606}{424242:60606}\)= \(\frac{2}{7}\).

ta có \(\frac{121212}{424242}=\frac{121212:60606}{424242:60606}=\frac{2}{7}\)

121212/424242=2/7 vì đề chia cho 60606

lay ca tu va mau chia 10101 thi ta dc 12/42 . Sau do ta se rut gon don gian hon

vi ca tu va mau cung chia het cho 6 nen chia ca tu va mau cho 6 thi ta dc 2/7 

Vay ds la 2/7

Mẹo lớp 4 cô có dạy but quên

\(a)\frac{199...9}{99...95}=\frac{1}{5}\)

\(b)\frac{121212}{424242}=\frac{2}{7}\)

\(c)\frac{187187187}{221221221}=\frac{11}{13}\)

~Học tốt~

\(a,\frac{199..9}{99..95}=\frac{1}{5}\)(Trượt tiêu)

\(b,\frac{121212}{424242}=\frac{2}{7}\)

\(c,\frac{187187187}{221221221}=\frac{11}{13}\)

121212/484848=

=12/48

1/4

1/4 đó bạn nhớ k nha

Ta có : \(\frac{121212}{484848}=\frac{121212:121212}{484848:121212}=\frac{1}{4}\)

Đáp số : \(\frac{1}{4}\)

\(\frac{199.......9}{999.......5}=\frac{199.......9:199.......9}{999.......5:199........9}=\frac{1}{5}\)

\(\frac{121212}{424242}=\frac{121212:10101}{424242:10101}=\frac{12}{42}\)

\(\frac{187187187}{221221221}=\frac{187187187:1001001}{221221221:1001001}=\frac{187}{221}\)

\(\frac{20082008}{20112011}=\frac{20082008:10001}{20112011:10001}=\frac{2008}{2011}\)

\(\frac{199...9}{99...95}\)=\(\frac{199...9:199...9}{99...95:199...9}\)\(\frac{\left(20so9\right)}{\left(20so9\right)}\)

=\(\frac{1}{5}\)

a:\(\dfrac{12}{13}\)

b:\(\dfrac{12}{13}\)

c:\(\dfrac{121}{131}\)

Câu a: \(\dfrac{12}{13}\)

Câu b: \(\dfrac{12}{13}\)

Câu c: \(\dfrac{121}{121}\)