Question

bài 1:trong các phân số 6/8, 4/9, 12/9, 27/36, 45/60 ,15/21, phân số nào bằng phân số 3/4 ?Vì sao?

Answer 1

\(\dfrac{6}{8}=\dfrac{6:2}{8:2}=\dfrac{3}{4};\dfrac{27}{36}=\dfrac{27:9}{36:9}=\dfrac{3}{4};\dfrac{45}{60}=\dfrac{45:15}{60:15}=\dfrac{3}{4}\\ \dfrac{15}{21}=\dfrac{15:3}{21:3}=\dfrac{5}{7}< \dfrac{3}{4}\\ \dfrac{12}{9}=\dfrac{12:3}{9:3}=\dfrac{4}{3}>\dfrac{3}{4}\\ \dfrac{4}{9}< \dfrac{1}{2}< \dfrac{3}{4}\\ Vậy:\dfrac{6}{8}=\dfrac{45}{60}=\dfrac{27}{36}=\dfrac{3}{4}\)

Answer 2

giúp mik với ạ!!!

Answer 3

Các phân số bằng 3/4 là:

\(\dfrac{6}{8}=\dfrac{6:2}{8:2}=\dfrac{3}{4}\)

\(\dfrac{27}{36}=\dfrac{27:9}{36:9}=\dfrac{3}{4}\)

\(\dfrac{45}{60}=\dfrac{45:15}{60:15}=\dfrac{3}{4}\)