15/21:x=3/7+2008/2009*2000/2008+9/2008*2008/2009
Tìmx
a)2/3+x=5/7+7/17:49/34 b)x-4/5+5/9=28/45
c)x:6/7+2/3=7/3 d)15/21:x=3/7+2008/2009*2000/2008+9/2008*2008/2009
tính:
C=2007/2008 x 1/2009 + 2007/2008 : 2009/2008 + 1/2008
(x.0,25+2009) . 2008=(53+2009) . 2008
Tính bằng cách hợp lý :
2009 x 2008 2008 - 2008 x 2009 2009
kb với mk nha
cho A= 2007/2008 + 2008/2009 + 2009/2010
Cho B= 2007 + 2008 +2009/ 2008 + 2009 + 2010
Hãy so sánh A vá B.
2007/2008 x 1/209 + 2007/2008 : 2009/2008+1/2008
Tim tat ca gia tri cua n sao cho:
(n+2008+2008+2008+...+2008)+(n+2009+2009+2009+...+2009)
(co tat ca 100 so 2009,2008)
2007/2008.1/2009 + 2007/2008 +2009/2008+1/2008
