Question

Tính bằng cách hợp lí nhất :

1919/2323 x 464646/747474 x 37/19 = ?

Answer 1

19/23 x 23/37 x 37/19

= 37/27

Answer 2

\(\dfrac{1919}{2323}\times\dfrac{464646}{747474}\times\dfrac{37}{19}\)

\(=\)\(\dfrac{1919:101}{2323:101}\times\dfrac{464646:10101}{747474:10101}\times\dfrac{37}{19}\)

\(=\dfrac{19}{23}\times\dfrac{46}{74}\times\dfrac{37}{19}\)

\(=\dfrac{19\times23\times2\times37}{23\times2\times37\times19}=1\)

Answer 3

= 19/23 x 23/37 x 37/19

= 19/37 x 37/19

= 1