A=1-2+3+4-5-6+7+8-9-10+11+12-...-2014+2015+2016
A=-1-2+3+4-5-6+7+8-9-10+11+12-.. ..-3013-2014+2015+2016
A=(0-1-2+3)+(4-5-6+7)+...+((2012-2013-2014+2015)+2016
A=0+0+...+0
A=2016
Vậy A=2016
nhé BạnA= -1-2+3+4-5-6+7+8-9-10+11+12-...-2013-2014+2015+2016
A=(0-1-2+3)+(4-5-6+7)+...+((2012-2013-2014+2015)+2016
A=0+0+...+0
A=2016
Vậy A=2016
Ta có:
A = -1 – 2 + 3 + 4 – 5 – 6 + 7 + 8 – 9 – 10 + 11 + 12 - ... – 2013 – 2014 + 2015 + 2016
A = (0 – 1 – 2 + 3) + (4 – 5 – 6 + 7) + ... + (2012- 2013 – 2014 + 2015) + 2016
A = 0 + 0 + ... + 0
A = 2016
Vậy A = 2016
#Mạt Mạt#
A=1-2+3+4-5-6+7+8-9-...+2007+2008-2009-2010
B=-1-2+3+4-5-6+7+8-9-10+11+12-...-2013-2014+2015+2016
C=(2+4+6+8+...+2014)-(3+5+7+9...+2011)
A = 1 + 2 - 3 - 4 + 5 + 6 - 7 - 8 + ... + 2005 + 2006 - 2007 - 2008 + 2009 + 2010 ( có 2010 số )
A = ( 1 + 2 - 3 - 4 ) + ( 5 + 6 - 7 - 8 ) + .... + ( 2005 + 2006 - 2007 - 2008 ) + ( 2009 + 2010 )
A = ( - 4 ) + ( - 4 ) + ... + ( - 4 ) + 4019 ( có 503 số )
A = ( - 4 ) . 502 + 4019
A = - 2008 + 4019
A = 2011.
CHÚC LÀM BÀI VUI VẺ
Tính A=-1-2+3+4-5-6+7+8-9-10+11+12-.......-2013-2014+2015+2016
A=-1+(-2+3+4-5)+(-6+7+8-9)+(-10+11+12-13)+.......+(-2010+2011+2012-2013)+(-2014+2015+2016)
A=-1+0+0+0+...+0+2017
A=2018
Tính A = ( -1 ) -2+3+4 -5-6+7=8-9-10+11+12 - ....-2013 - 2014+2015+2016
A = -1 - 2 + 3 + 4 - 5 - 6 + 7 + 8 - 9 - 10 + 11 + 12 - ... - 2013 - 2014 + 2015 + 2016
=> A = (-1 - 2 + 3 + 4) + (-5 - 6 + 7 + 8) + (-9 - 10 + 11 + 12) + ... + (-2013 - 2014 + 2015 + 2016)
=> A = 4 + 4 + 4 + ... + 4
có 2016 : 4 = 504 (số 4)
=> A = 4 . 504
=> A = 2016
Tính A = (-1) -2 +3 +4 - 5 -6 +7=8 -9-10 +11+12 -...-2013 - 2014+2015+2016
1) A = - 1 - 2 + 3 + 4 - 5 - 6 + 7 + 8 - 9 - 10 + 11 + 12 - ... - 2013 - 2014 + 2015 + 2016
Ta có:
A = -1 – 2 + 3 + 4 – 5 – 6 + 7 + 8 – 9 – 10 + 11 + 12 - ... – 2013 – 2014 + 2015 + 2016
A = (0 – 1 – 2 + 3) + (4 – 5 – 6 + 7) + ... + (2012- 2013 – 2014 + 2015) + 2016
A = 0 + 0 + ... + 0
A = 2016
Vậy A = 2016
#Mạt Mạt#
A = (-1 + -5 + -9 +...... + -20130) + (-2 + -6 + -10 + ... + -2014) + ( 3 + 7 + 11 +... + 2015) + (4 + 8 + 12 +.... +2016)
A = -507528 + -508032 + 508032 + 509040
A = 1512
:)))
Ta có: A = - 1 - 2 + 3 + 4 - 5 - 6 + 7 + 8 - 9 - 10 + 11 + 12 - .... - 2013 - 2014 + 2015 + 2016
=(- 1 - 2 + 3 + 4) - (5 + 6 - 7 - 8) - (9 + 10 - 11 - 12) - .... - (2013 + 2014 - 2015 - 2016)
= 4 - (- 4) - (- 4) - .... - (- 4)
= 4 + 4 + 4 + .... + 4
Có 2016 : 4 = 504 nhóm \(\Rightarrow\)A = 504 x 4 = 2016
Vậy A = 2016
\(-1-2+3+4-5-6+7+8-9-10+11+12-...-2013-2014+2015+2016\\ \) 2016
Tính tổng:
M=1-2-3+4+5-6-7+8+9-10-11+12+...+2013-2014-2015+2016
M = 1-2-3+4 + 5-6-7+8+9-10-11+12+....+2013-2014-2015+2016
M = (1-2-3+4)+(5-6-7+8) + (9-10-11+12)+..... + (2013 - 2014 - 2015 - 2016)
M = 0 + 0 + 0 + ..... + 0
M = 0