分析:(1)根據(jù)零指數(shù)冪和負(fù)整數(shù)指數(shù)冪的公式進(jìn)行計(jì)算即可.
(2)根據(jù)整式的運(yùn)算法則,先算乘除,后算加減,有括號(hào)先算括號(hào),本題運(yùn)算的計(jì)算公式較多.
(3)根據(jù)多項(xiàng)式乘多項(xiàng)式的計(jì)算公式計(jì)算即可.
(4)先對(duì)所給式子進(jìn)行變形,然后利用平方差公式計(jì)算.
解答:解:(1)
-12009+()-1-(3.14-π)0=-1+2-1=0;
(2)2x
5•(2x
-2y)
2-(x
3y
2)÷x
5y
2
=2x
5•4x
-4y
2-x
6y
4÷x
5y
2=8xy
2-xy
2=7xy
2;
(3)(m+n)(m
2-mn+n
2)
=m
3-m
2n+mn
2+m
2n-mn
2+n
3=m
3+n
3;
(4)(2m+1-3n)(2m-1+3n)
=(2m)
2-(1-3m)
2=4m
2-(1-6n+9n
2)
=4m
2-1+6n-9n
2.
故答案為0、7xy
2、m
3+n
3、4m
2-1+6n-9n
2.
點(diǎn)評(píng):本題主要考查整式的混合運(yùn)算和負(fù)整數(shù)指數(shù)冪及零指數(shù)冪的知識(shí)點(diǎn),不是很難.