Ta thấy:

      123123 × 456 = 123 × 1001 × 456

      456456 × 123 = 456 × 1001 × 123

       Do đó: 123123 × 456 = 456456 × 123

123123.456 và 456456.123

123123/1001 = 123

456456/1001= 456

123.456 và 456.123 là bằng nhạu

ket qua la 123123x456 lon hon ban nhe

Ta có:

123123=123.1001

=>123123.456=123.1001.456 (1) 

 456456=456.1001

=>456456.123=456.1001.123 (2)

Từ (1) ,(2)=>123123.456=456456.123

K mình nhé!

các bạn giúp mình nha

​

ko biết

Ta có 23/45>8/25

Nên 23/45>8/19

Ta có 123/25<233/25

Nên 123/25<233/237

A.4/3 > 95/96

B.25/68 > 20/99

C. 9/50 <11/42

> 

> 

 <

A.4/3 > 95/96

B.25/68 >20/99

C. 9/50  <11/42

\(\dfrac{212121}{232323}=\dfrac{212121:10101}{232323:10101}=\dfrac{21}{23}\)

\(\dfrac{123123}{124124}=\dfrac{123123:1001}{124124:1001}=\dfrac{123}{124}\)

Ta có: \(1-\dfrac{21}{23}=\dfrac{2}{23}\) ; \(1-\dfrac{123}{124}=\dfrac{1}{124}=\dfrac{2}{248}\)

\(=>\dfrac{2}{23}>\dfrac{2}{248}\)

\(=>1-\dfrac{21}{23}>1-\dfrac{123}{124}\)

\(=>\dfrac{21}{23}< \dfrac{123}{124}\)

\(=>\dfrac{212121}{232323}< \dfrac{123123}{124124}\)

a) Ta có: \(\dfrac{34}{35}< 1;\dfrac{21}{20}>1\Rightarrow\dfrac{34}{35}< 1< \dfrac{21}{20}\)

Vậy \(\dfrac{34}{35}< \dfrac{21}{20}\)

a: \(\dfrac{34}{35}< 1< \dfrac{21}{20}\)

b: \(-\dfrac{123}{124}>-1>\dfrac{-321}{312}\)

c: \(\dfrac{1}{31}>\dfrac{1}{41}\)

\(\Leftrightarrow\dfrac{10}{31}+1>\dfrac{10}{41}+1\)

\(\Leftrightarrow\dfrac{41}{31}>\dfrac{51}{41}\)