Question

rút gọn rồi so sánh phân số

90/126 và 6/7

90/126 và 35/49

Answer 1

\(\dfrac{90}{126}=\dfrac{5}{7}\)

\(\Rightarrow\dfrac{90}{126}< \dfrac{6}{7}\) (Vì \(\dfrac{5}{7}< \dfrac{6}{7}\))

\(\dfrac{35}{49}=\dfrac{5}{7}\)

\(\Rightarrow\dfrac{90}{126}=\dfrac{35}{49}\) (Vì \(\dfrac{5}{7}=\dfrac{5}{7}\))

Answer 2

  

Answer 3

\(\dfrac{90}{126}\) = \(\dfrac{90:18}{126:18}\) = \(\dfrac{5}{7}\) so sánh \(\dfrac{5}{7}< \dfrac{6}{7}\) nên \(\dfrac{90}{126}< \dfrac{6}{7}\)

\(\dfrac{90}{126}=\dfrac{5}{7}\) và \(\dfrac{35}{49}\) = \(\dfrac{35:7}{49:7}=\dfrac{5}{7}\) so sánh \(\dfrac{5}{7}=\dfrac{5}{7}\) nên \(\dfrac{90}{126}=\dfrac{35}{49}\)