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( 2013 x 2014 + 2014 x 2015 + 2015 x 2016) x ( 1 + 1/3 - 4/3)
=( 2013 x 2014 + 2014 x 2015 + 2015 x 2016) x ( 4/3 - 4/3)
=( 2013 x 2014 + 2014 x 2015 + 2015 x 2016) x 0
=0
Ta có: \(\left(2013\cdot2014+2014\cdot2015+2015\cdot2016\right)\left(1+\dfrac{1}{3}-\dfrac{4}{3}\right)\)
\(=\left(2013\cdot2014+2014\cdot2015+2015\cdot2016\right)\left(\dfrac{3}{3}+\dfrac{1}{3}-\dfrac{4}{3}\right)\)
=0
a) 20,8 x 45 + 0,37 x 15 + 20,8 x 55 x 0,63
= 20,8 x ( 45 + 55 x 0,63 ) + 0,37 x 15
= 20,8 x ( 45 + 34,65 ) + 5,55
= 20,8 x 79,65 + 5,55
= 1656,72 + 5,55
= 1662,27
b) ( 2013 x 2014 + 2014 x 2015 + 2015 x 2016 ) x ( 1 + 1/3 - 1 và 1/3 )
= ( 2013 x 2014 + 2014 x 2015 + 2015 x 2016 ) x [( 1 - 1 ) + ( 1/3 - 1/3 ) ]
= ( 2013 x 2014 + 2014 x 2015 + 2015 x 2016 ) x 0
= 0
2012 + 2013 x 2014 / 2014 x 2015 -2016 = 1
mình trả lời đầu tiên nha
\(\frac{2012+2013.2014}{2014.2015-2016}\)= \(\frac{2012+2013.2014}{2014.\left(2013+2\right)-2016}\) = \(\frac{2012+2013.2014}{2014.2013+2.2014-2016}\)= \(\frac{2012+2013.2014}{2014.2013+4028-2016}\)= \(\frac{2012+2013.2014}{2014.2013+2012}\)= \(1\)
\(\frac{2012+2013.2014}{2014.2015-2016}\)
\(\frac{2012+2013.2014}{2014.\left(2013+2\right)-2016}\)
\(\frac{2012+2013.2014}{2014.2013+2014.2-2016}\)
\(\frac{2012}{2012}\)
\(1\)
2012+2013x2014/2014x2015-2016
=2012+4054182/4058210-2016
=4056194:4056194
=1
bằng 1 thưa bạn
=(2014*2013 +2014+2014-2016) : (2012 +2013*2014)
=(2014*2013 +2012):(2012+2013*2014)
( 2014 x 2015 - 2016 ) : ( 2012 + 2013 x 2014 )
= ( 4058210 - 2016 ) : ( 2012 + 4054182 )
= 4056194 : 4056194
= 1
﴾ 2014 x 2015 ‐ 2016 ﴿ : ﴾ 2012 + 2013 x 2014 ﴿
= ﴾ 4058210 ‐ 2016 ﴿ : ﴾ 2012 + 4054182 ﴿
= 4056194 : 4056194
= 1