Question

[trần quang khải]

Rút gọn các phân số sau:
a ) 3.7.11/22.9
b)  49.7+49/10
c) 12.5-9.12/32.6

Answer 1

[Nguyễn Lê Phước Thịnh]

a: \(=\dfrac{21\cdot11}{22\cdot9}=\dfrac{1}{2}\cdot\dfrac{7}{3}=\dfrac{7}{6}\)

b: \(=\dfrac{49\cdot8}{10}=49\cdot\dfrac{4}{5}=\dfrac{196}{5}\)

c: \(=\dfrac{12\cdot\left(-4\right)}{32\cdot6}=\dfrac{-48}{192}=-\dfrac{1}{4}\)

Answer 2

[zero]

a: $=\frac{21\cdot 11}{22\cdot 9}=\frac{1}{2}\cdot \frac{7}{3}=\frac{7}{6}$