Question

chứng tỏ phân số bằng nhau

\(\frac{123}{127}=\frac{123123}{127127}\)

\(\frac{13}{15}=\frac{1313}{1515}=\frac{131313}{151515}\)

Answer 1

a) 123/127 = 123123/127127

Ta có 123123/127127 = 123 x 1001/127 x 1001

                              <=> 123123/ 127127 = 123 /127

Vậy 123/127 = 123123 /127127

b) 13/15 = 1313/1515 = 131313/151515

- Ta có 1313/1515 = 13 x 101 / 15 x 101 

                         <=> 1313/1515 = 13/15

- ta cũng có : 131313/151515 = 13 x 10101 / 15 x10101

                                          <=> 131313/151515 = 13/15 

Vậy 13/15 = 1313/1515 = 131313 /151515

Chúc bạn học tốt <3

Answer 2

123/127=123123/127127=123 x 1001/127 x 1001=123/127

13/15=1313/1515=13 x 101/15 x 101=13 x 10101/15 x 10101=13/15

ung ho nhe

Answer 3

\(\frac{123}{127}=\frac{123123}{127127}\Rightarrow\frac{123}{127}=\frac{123.1001}{127.1001}\Rightarrow\frac{123}{127}=\frac{123}{127}\Rightarrow\frac{123}{127}=\frac{123123}{127127}\)

\(\frac{13}{15}=\frac{1313}{1515}=\frac{131313}{151515}\Rightarrow\frac{13}{15}=\frac{13.101}{15.101}=\frac{13.10101}{15.10101}\Rightarrow\frac{13}{15}=\frac{13}{15}=\frac{13}{15}\Rightarrow\frac{13}{15}=\frac{1313}{1515}=\frac{131313}{151515}\)

Answer 4

123x1001/127x1001=123123/127127

13x101/15x101=1313/1515

13x10101/15x10101=131313/151515

Nhớ li ke mk nha