Question

Tính : [PHÂN SỐ]
14 x 9 / 21 x 3.
15 x 26 x 8/45 x 13 x 16

Answer 1

\(\dfrac{14\times9}{21\times3}=\dfrac{2\times7\times3\times3}{3\times7\times3}=2.\\ \dfrac{15\times26\times8}{45\times13\times16}=\dfrac{3\times5\times2\times13\times2\times2\times2}{5\times3\times3\times13\times2\times2\times2\times2}=\dfrac{1}{3}.\)

Answer 2

a: \(=\dfrac{126}{63}=2\)

b: \(=\dfrac{15\cdot16\cdot13}{15\cdot3\cdot13\cdot16}=\dfrac{1}{3}\)