Question

so sánh 2 phân số:   123 / 124  và 124124 / 125125

 

Answer 1

Ta có : \(\frac{124124}{125125}=\frac{124124:1001}{125125:1001}=\frac{124}{125}\)

\(\frac{123}{124}=1-\frac{1}{124}\); \(\frac{124}{125}=1-\frac{1}{125}\)

Vì 1/124 < 1/125 => 123/124 > 123/125 => 123/124 > 124124/125125

Answer 2

ta có: \(\frac{124124}{125125}=\frac{124}{125}\)

Lại có: \(1-\frac{123}{124}=\frac{1}{124};1-\frac{124}{125}=\frac{1}{125}\)

\(\Rightarrow\frac{1}{124}>\frac{1}{125}\Rightarrow1-\frac{123}{124}>1-\frac{124}{125}\)

\(\Rightarrow\frac{123}{124}< \frac{124}{125}\Rightarrow\frac{123}{124}< \frac{124124}{125125}\)

Answer 3

So sánh 2 phân số : 123 / 124 và 124124 / 125125

124124 / 125125 = 124 / 125

123 / 124 = 1 - 123 / 124 = 1/124

124 / 125 = 1 - 124 / 125 = 1/125 

Vì 1/ 124 > 1/125 => 123/124 > 124124/125125

Vậy 123/124 > 124124/125125

Answer 4

Ta co 124124/125125=124/125

          co phan so trung gian 123/125

         ma 123/124>123/125 (1)

         va 124/125<124/125  (2)

Tu (1)va(2) =>123/124<124/125

Vay 123/124<124124/125125

L-I-K-E M-A-T-H