计算:(1)5b•(-4ab2)=______;(2)-5a5b3c÷15a4b3=______;(3)(1.5x2y-10xy2)÷(-5xy)=______
题型:填空题难度:一般来源:不详
计算: (1)5b•(-4ab2)=______; (2)-5a5b3c÷15a4b3=______; (3)(1.5x2y-10xy2)÷(-5xy)=______. |
答案
(1)原式=-20ab3. (2)原式=-ac; (3)原式=1.5x2y÷(-5xy)-10xy2÷(-5xy)=-3x+2y. 故答案为:-20ab3、-ac、-3x+2y. |
举一反三
设(a2-2ab2+ab)÷M=a,则M=______. |
下列四个算式: ①(-3x)4÷(-9x3)=-9x ②x(-x3)2n+1÷(-x3)=-x6n ③a7b3÷(a2b2)=a3b ④-15a5b3÷5a3b2=-3a2b 其中计算不正确的是( ) |
计算: (1)[x(x2y2-xy)-y(x2-x3y)]÷3x2y; (2)已知:xm=3,xn=2,求x3m+2n. |
计算:(6×105)÷(2×102)=______. |
最新试题
热门考点