\(\frac{424242}{303030}\) =  \(\frac{424242:60606}{303030:60606}\) = \(\frac{7}{5}\)

\(\frac{7}{5}\)

\(\frac{121212}{424242}=\frac{121212:10101}{424242:10101}=\frac{12}{42}=\frac{2}{7}\)

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

121212 / 424242 = 2/7

1999999999 / 9999999995 = 1/5

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

= \(\frac{12.10101}{42.10101}\)

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

\(\frac{323232}{424242}=\frac{32\cdot10101}{42\cdot10101}=\frac{32}{42}=\frac{16}{21}\)

16/21 nha!

\(\frac{323232:20202}{424242:20202}=\frac{16}{21}\)

        ~ học tốt ~

lấy máy tính , tính sẽ ra

1313/1717 = 13/17

102102/109109 = 102/109

424242/535353 = 42/53

103103103/109109109 = 103/109

chịu thua luôn 

easy vãi loz

Bài 1:

\(\frac{1313}{2121}=\frac{1313:101}{2121:101}=\frac{13}{21}\)

\(\frac{165165}{143143}=\frac{165165:1001}{143143:1001}=\frac{165}{143}=\frac{15}{13}\)

\(\frac{424242}{151515}=\frac{424242:10101}{151515:10101}=\frac{42}{15}=\frac{14}{5}\)

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)

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

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