计算:200-199+198-197+…+4-3+2-1=______.
计算:200-199+198-197+…+4-3+2-1=______.
计算:1×2+2×4+3×6+…+1005×2010=______.
计算:120-119+118-117+116-115+…+4-3+2-1=______.
计算:1-2+3-4+…+97-98+99=______.
计算:1-2+3-4+5-6+…+87-88=______.
计算:1-2+3-4+5-6+…+2009-2010=______.
计算:1-2+3-4+5-…-98+99=______.
计算:(-4x-3y)2=______.
计算:1+2+3+…+2012+2013+2012+…+3+2+1=______.
计算:1-2+3-4+5-6+…+2011-2012的值是______.
计算:1+3-2+2+4-3+3+5-4+4+6-5+…+36+38-37=______.
计算:(-1-1)(1-2)(2-3)(3-4)…(2010-2011)=______.