phần a  mình biết làm còn phần b thì chịu

a) 2014/2014 = 1

2012/2016 < 1

 => 2014/2014 > 2012/2016

b) mik chịu

giống câu hỏi tui đó. ghi ko đầy đủ chính xác dễ hiểu hơn tui

    2014 : 25 - 2012 : 25

=  (2014 - 2012) : 25

=   2  :  25

=     0,08

25x20,14+4+2014-20,14x203,3+2014x20,04

= 503,5+4+2014-4094,462+40360,56

= 507,5+2014+40360,56-4094,462

= 2521,5+40360,56-4094,462

= 42882,06-4094,462

= 38787,598

mn giúp mik với!!!!!☘

sossssssssssssssssss

2014 x 3 + 4028 x 2 + 2014 x 5 - 2014 x 2

= 2014 x 3 + 2014 x 2 x 2 + 2014 x 5 - 2014 x 2

= 2014 x 3 + 2014 x 4 + 2014 x 5 - 2014 x 2

= 2014 x ( 3 + 4 + 5 - 2 )

= 2014 x 10 = 20140

\(2014\text{×}3+4028\text{×}2+2014\text{×}5-2014\text{×}2\\ =2014\text{×}3+2014\text{×}2\text{×}2+2014\text{×}5-2014\text{×}2\\ =2014\text{×}3+2014\text{×}4+2014\text{×}5-2014\text{×}2\\ =2014\text{×}\left(3+4+5-2\right)=2014\text{×}10=20140\)

ta có: 2014 : x = 26 du 12

\(\Rightarrow26\times x+12=2014\)

\(26\times x=2014-12\)

\(26\times x=2002\)

x = 2002 : 26

x = 77

\(2014:x=26\left(r=12\right)\) (r là số dư)

\(\Rightarrow\left(2014-12\right)⋮26\Rightarrow2002:x=26\)

\(\Rightarrow x=2002:26=77\)

Vậy, x = 77

a ) 10 nha 

b ) 41 ( không chắc lắm )

c ) 10700

d ) 88

e) 454

Bài a,b tự làm:

c,99 x 2014-50 x 2014+2014

=(99-50+1) x 2014

=50 x 2014

=100700

d,(81 x 11):9

=891:9

=99

e,46 x 6+46 x 4

=46 x (4+6)

=46 x 10

=460

Ta có: \(\frac{\frac{2014}{1}+\frac{2013}{2}+\frac{2012}{3}+...\frac{1}{2014}+2014}{1+\frac{1}{2}+\frac{1}{3}+...+\frac{1}{2014}}\)=

= \(\frac{\left(\frac{2013}{2}+1\right)+\left(\frac{2012}{3}+1\right)+...+\left(\frac{1}{2014}+1\right)+1+2014}{1+\frac{1}{2}+\frac{1}{3}+...+\frac{1}{2014}}\)=

= \(\frac{\frac{2015}{2}+\frac{2015}{3}+...+\frac{2015}{2014}+2015}{1+\frac{1}{2}+\frac{1}{3}+...+\frac{1}{2014}}\)=\(\frac{2015.\left(\frac{1}{2}+\frac{1}{3}+...+\frac{1}{2014}+1\right)}{1+\frac{1}{2}+\frac{1}{3}+...+\frac{1}{2014}}\)=2015