问题
填空题
计算:(a2b)3=______;
(-2×103)3=______;
(-2xy2)3=______.
答案
(a2b)3=a6b3;
(-2×103)3=(-2)3×103×3=-8×109;
(-2xy2)3=(-2)3x3y6=-8x3y6.
故答案为:a6b3;-8×109;-8x3y6.
计算:(a2b)3=______;
(-2×103)3=______;
(-2xy2)3=______.
(a2b)3=a6b3;
(-2×103)3=(-2)3×103×3=-8×109;
(-2xy2)3=(-2)3x3y6=-8x3y6.
故答案为:a6b3;-8×109;-8x3y6.