问题
填空题
计算:(1)7a4•ab2=______.
(2)(2×104)×(-6×103)=______.
(3)3a2b3(-ab2)3=______.
答案
(1)7a4•ab2=7a5b2,
(2)(2×104)×(-6×103)=-1.2×108;
(3)3a2b3(-ab2)3=3a2b3×(-a3b6)=-3a5b9.
故答案为:7a5b2;-1.2×108;-3a5b9.
计算:(1)7a4•ab2=______.
(2)(2×104)×(-6×103)=______.
(3)3a2b3(-ab2)3=______.
(1)7a4•ab2=7a5b2,
(2)(2×104)×(-6×103)=-1.2×108;
(3)3a2b3(-ab2)3=3a2b3×(-a3b6)=-3a5b9.
故答案为:7a5b2;-1.2×108;-3a5b9.