1 4 -8x
6y
9 10 1 2
99 x
2-x-2 x
2-4y
2 4a
2+4ab+b
2 
a
4
a
2
4x
2+12xy+9y
2 a-2 5+x 4b-2a x
n-y
n分析:按照實數的運算法則依次計算,注意:(-1)
-2010=1.
解答:(-1)
-2010=1;
(-0.5)
-2=4;
(-2x
2y
3)
3=-8x
6y
9;
(0.1)
7÷(0.1)
8=10;

=1;
(-2)
100+(-2)
99=2
99;
(x-2)(x+1)=x
2-x-2;
(x-2y)(x+2y)=x
2-4y
2;
(2a+b)
2=4a
2+4ab+b
2;

=

a
4
a
2
;
(2x+3y)
2=4x
2+12xy+9y
2;
(a+2)(a-2)=a
2-4;
(5+x)(5-x)=25-x
2;
(2a+4b)(4b-2a)=16b
2-4a
2;
(x
n+y
n)(x
n-y
n)=x
2n-y
2n點評:本題考查了有理數的乘方,整式的運算,完全平方公式,平方差公式熟練掌握各種運算的運算法則和性質是解題的關鍵,本題需注意的知識點是:a
-p=

,負數的絕對值是正數.