分析:(1)根據(jù)立方根的定義、算術(shù)平方根的定義計(jì)算即可;
(2)根據(jù)單項(xiàng)式乘以多項(xiàng)式的法則計(jì)算,再合并;
(3)根據(jù)多項(xiàng)式乘以多項(xiàng)式的法則展開,再去括號(hào),合并;
(4)根據(jù)多項(xiàng)式除以單項(xiàng)式的法則計(jì)算,再合并;
(5)根據(jù)完全平方公式計(jì)算,再合并;
(6)根據(jù)平方差公式計(jì)算.
解答:解:(1)原式=3+
-
×(-4)
=3+
+1
=4
;
(2)原式=a
2+a-a+a
2
=2a
2;
(3)原式=2x
2-(x
2+3x+2)
=x
2-3x-2;
(4)原式=-3x+2x
2-2x
2
=-3x;
(5)原式=a
2+b
2-(a
2+4ab+4b
2)
=-4ab-3b
2;
(6)原式=2003
2-(2003+2)(2003-2)
=2003
2-2003
2+4
=4.
點(diǎn)評(píng):本題考查了整式的混合運(yùn)算、實(shí)數(shù)運(yùn)算,解題的關(guān)鍵是掌握有關(guān)運(yùn)算法則,以及去括號(hào)、合并同類項(xiàng).