Question

rút gọn các phân số sau :

a) 123123/363363

b) 199619961996/149714971497

c) 1818181818/8181818181

Answer 1

a,

\(\dfrac{123123}{363363}=\dfrac{41\cdot3003}{121\cdot3003}=\dfrac{41}{121}\)

b,

\(\dfrac{199619961996}{149714971497}=\dfrac{4\cdot49904990499}{3\cdot49904990499}=\dfrac{4}{3}\)

c,

\(\dfrac{1818181818}{8181818181}=\dfrac{2\cdot909090909}{9\cdot909090909}=\dfrac{2}{9}\)

Answer 2

a, \(\dfrac{123123}{363363}=\dfrac{123123:1001}{363363:1001}=\dfrac{123:3}{363:3}=\dfrac{41}{121}\)

b, \(\dfrac{199619961996}{149714971497}=\dfrac{199619961996:100010001}{149714971497:100010001}\)

\(=\dfrac{1996:499}{1497:499}=\dfrac{4}{3}\)

c, \(\dfrac{1818181818}{8181818181}=\dfrac{1818181818:101010101}{8181818181:101010101}\)

\(=\dfrac{18:9}{81:9}=\dfrac{2}{9}\)

@nguyen linh ngoc