a) 2014 x 7 + 2 x 2014 + 2014 

= 2014 x ( 7+2+1)

= 2014 x 10 = 20140

b) 4/7 - 9/7 - 2/7 x 4

= (4-9-2) / 2 x 4

= (-7)  : 2 x 4 = -7 x 2 = -14

a. 2014x7+2x2014+2014

=2014x7+2x2014+2014x1

=2014x(2+7+1)

=2014x10

=20140

a, 2014 x 7 + 2 x 2014 + 2014

= 2014 x ( 7 + 2 ) + 2014

= 2014 x 9 + 2014

= 18126 + 2014

= 20140

b) \(\frac{4}{7}\)- \(\frac{9}{7}\)- \(\frac{2}{7}\)x 4

= \(\frac{4-9-2}{7}\)x 4

= -1 x 4

= -4

k cho mik nha

\(4^{2017}:\left(4^{2014}+3\cdot4^{2014}\right)\)

\(=4^{2017}:4^{2014}\left(1+3\right)\)

\(=4^3\cdot4\)

\(=4^4\)

\(=256\)

 4^2017 : ( 4^2014 + 3 . 4^2014 )

=\(\frac{\text{4^2017}}{\text{( 4^2014 + 3 . 4^2014 )}}\)

=\(\frac{\text{4^2017}}{\text{4^2017.4}}\)

=\(\frac{1}{4}\)

4^2017:(4^1014+3.4^2014)

=4^2017:[4^2014.(1+3)]

4^2017:[4^2014.4]

4^2017:4^2015=4^2=16

2013/2014

\(\frac{14}{13}\) x \(\frac{15}{14}\) x \(\frac{16}{15}\) x ... x \(\frac{2014}{2013}\)x \(\frac{2015}{2014}\)

=  \(\frac{14x15x16x...x2013x2014x2015}{13x14x15x16x...x2013x2014}\)

= 14 x 2015

=28210

\(\frac{2013}{2014}+\frac{5}{2014}\div5-\frac{1}{2013}\)

\(=\frac{2013}{2014}+\frac{5}{2014}.\frac{1}{5}-\frac{1}{2013}\)

\(=\frac{2013}{2014}+\frac{1}{2014}-\frac{1}{2013}\)

\(=\frac{2014}{2014}-\frac{1}{2013}\)

\(=1-\frac{1}{2013}\)

\(=\frac{2012}{2013}\)

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

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

hack à