Question

So sánh 797979 / 858585 và 7979 / 8585

Answer 1

Gợi ý: 797979 = 79 x 10101; 858585 = 85 x 10101

7979 = 101; 8585 = 85 x 101

Answer 2

\(\frac{797979}{858585}=\frac{79\times10101}{85\times10101}=\frac{79}{85}\left(1\right)\)

\(\frac{7979}{8585}=\frac{79\times101}{85\times101}=\frac{79}{85}\left(2\right)\)

Từ (1) và(2) suy ra \(\frac{797979}{858585}=\frac{7979}{8585}\)