Các câu hỏi tương tự
B=2010-1-2-3-4-...................-98-99-100
(100-99+98+97+96-95+.....................+4-3+2-1)/50+2010-12*X=91
Tìm x :
( 100 - 99 + 98 - 97 + 96 - 95 + .......+ 4 - 3 + 2 - 1 ) : 50 + 2010 - 12 x X = 91
200 - 18 : (372:3.x-1)-28=166
(100-99+98-97+96-95+...+4-3+2-1):50+2010-12.x=91
x-(31/3+31/15+31/35+31/63+31/99+31/143)=9/13
1. Sap xep theo thu tu tu nho den lon
14/2014; 5/2014; 100/49; 39/2000; 100/41; 39/2005; 39/1999; 100/21; 39/2007; 39/1993; 99/2012; 99/1999; 39/2013; 99/2000; 39/2010; 99/1997; 31/2014; 15/2014; 18/2014; 17/2014
tính nhanh (2/3+3/4+5/6+...+99/100).(1/2+2/3+3/4+...+98/99)-(1/2+1/3+...+99/100).(2/3+2/4+...+98/99)
100 + 99/2 + 98/3 + .......... 2/99 + 1/100 : 100/2 + 100/3 +.......+ 100/100+100/101
Tính:
A = \(\frac{1+\left(1+2\right)+\left(1+2+3\right)+...+\left(1+2+3+...+99\right)}{1\times99+2\times98+3\times97+...+99\times1}\)
B = \(\frac{1\times2010+2\times2009+3\times2008+...+2010\times1}{\left(1+2+3+...+2010\right)+\left(1+2+3+...+2009\right)+...+\left(1+2\right)+1}\)
(101+100+99+...+3+2+1) : (101-100-99..-3-2-1)