a. Ta có : \(\frac{1313}{1515}=\frac{13.101}{15.101}=\frac{13}{15}\)

              \(\frac{1326}{1428}=\frac{13.102}{14.102}=\frac{13}{14}\)

Vì \(\frac{13}{15}< \frac{13}{14}\)(do 15> 14)

=>\(\frac{1313}{1515}< \frac{1326}{1428}\)

b.Ta có : \(1-\frac{119}{120}=\frac{1}{120}\)

              \(1-\frac{118}{119}=\frac{1}{119}\)

Vì \(\frac{1}{120}< \frac{1}{119}\)(do 120>119)

=> \(1-\frac{1}{120}>1-\frac{1}{119}\)

=>\(\frac{119}{120}>\frac{118}{119}\)

ta cos:

119/120=1-1/120

118/119=1-1/119

mà: 119<120

nên: 119/120>118/119

Ta có : \(1-\frac{119}{120}=\frac{1}{120}\)

\(1-\frac{118}{119}=\frac{1}{119}\)

mà 119 < 120

\(\Rightarrow\frac{1}{120}< \frac{1}{119}\)

\(\Rightarrow1-\frac{1}{120}>1-\frac{1}{119}\)

\(\Rightarrow\frac{119}{120}>\frac{118}{119}\)

vậy.....

trạng nguyên tiếng việt nha bạn

a)Ta có: \(\frac{1313}{1515}< \frac{1313}{1428}< \frac{1326}{1428}\Rightarrow\frac{1313}{1515}< \frac{1326}{1428}\)

b)Ta có: \(1-\frac{119}{120}=\frac{1}{120}< 1-\frac{118}{119}=\frac{1}{119}\Rightarrow\frac{119}{120}>\frac{118}{119}\)

c)Ta có: \(\frac{222}{555}< \frac{222}{444}< \frac{333}{444}\Rightarrow\frac{222}{555}< \frac{333}{444}\)

A) <

b) >

c) =

97/100=1-3/100

119/122=1-3/122

mà 3/100>3/122

nên 97/100<119/122

97/100 > 119/122

97/100 lớn 119/122

Ta có: 1 - 97/100 = 3/100

1 - 119/122 = 3/122

Có: 3/100 > 3/122

\(\Rightarrow\) 97/100 < 119/122

97/100=1-3/100

119/122=1-3/122

mà 3/100>3/122

nên 97/100<119/122

\(\dfrac{555}{1110};\dfrac{333}{444};\dfrac{444}{555};\dfrac{118}{119};\dfrac{119}{120}\)

\(\dfrac{444}{555}\) = \(\dfrac{444:111}{555:111}\) = \(\dfrac{4}{5}\) = 1 - \(\dfrac{1}{5}\)

\(\dfrac{333}{444}\) = \(\dfrac{333:111}{444:111}\) = \(\dfrac{3}{4}\) = 1 - \(\dfrac{1}{4}\)

                   \(\dfrac{118}{119}\)        = 1 -  \(\dfrac{1}{119}\)

                    \(\dfrac{119}{120}\)      = 1 - \(\dfrac{1}{120}\)

\(\dfrac{555}{1110}\) = \(\dfrac{555:555}{1110:555}\) = \(\dfrac{1}{2}\) = 1 - \(\dfrac{1}{2}\)

Vì : \(\dfrac{1}{2}>\dfrac{1}{3}>\dfrac{1}{4}>\) \(\dfrac{1}{119}\) > \(\dfrac{1}{120}\)

 nên \(\dfrac{555}{1110}>\dfrac{333}{444}>\)\(\dfrac{444}{555}\) > \(\dfrac{118}{119}\) > \(\dfrac{119}{120}\)

Vậy Các phân số đã cho được sắp xếp theo thứ tự từ bé đến lớn là:

          \(\dfrac{555}{1110}\);   \(\dfrac{333}{444}\); \(\dfrac{444}{555}\); \(\dfrac{118}{119}\);  \(\dfrac{119}{120}\)

Ta có: 13/15 = 1 - 2/15 = 1- 20/150.

 133/153 = 1-20/153.

Ta thấy 150 < 153 nên 20/150 >20/153 suy ra 1- 20/150 < 1- 20/153 hay 13/15< 133/153

Ta có: 13/15 = 1 - 2/15 = 1- 20/150. 133/153 = 1-20/153. Ta thấy 150 < 153 nên 20/150 >20/153 suy ra 1- 20/150 < 1- 20/153 hay 13/15< 133/153