计算:1-2+3-4.+99-100=_____.
计算:1-2+3-4.+99-100=_____.
计算(3x-2)(1-2x)(-5x)=_____
一元二次方程解法有(1)_____(2)_____(3)_____(4)_____(5)_____
(+1)+(-2)+(+3)+(-4)+……+(+99)+(-100)=_____
计算:1993+1992-1991-1990+1989+1988-1987-1986+…+5+4-3-2+1=_____
请不要乱做.一.计算.4878493除以756757=_____(1)4645.54除以453.764=_____ (2
计算(√3-2)^2010×(√3+2)^2011=_____.
计算下列各题1、 _____ ________ __________ _____________(1)√11-2 (2)
(1)计算:(a-1)(a²+a+1)=_____,(2x-y)(4x²+2xy+y²)=
1+2+3+4+5+6.+99=(_____)^2
计算(1-2)*(2-3)*(3-4)*.*(19-20)的积的符号为____,因为负因数个数为_____数.
计算:3/14除以4/7=_____.