计算:3a+2a=______;3a•2a=______;3a÷2a=______;a3•a2=______;a3÷a2=______;(-3ab2)2=___
题型:填空题难度:一般来源:不详
计算:3a+2a=______;3a•2a=______;3a÷2a=______;a3•a2=______; a3÷a2=______;(-3ab2)2=______. |
答案
3a+2a=5a; 3a•2a=6a2; 3a÷2a=1.5; a3•a2=a5; a3÷a2=a; (-3ab2)2=9a2b4. |
举一反三
计算:(______)•3ab2=9ab5;-12a3bc÷(______)=4a2b;(4x2y-8x3)÷4x2=______. |
计算: (1)-++|-|-(-)+; (2)(x4+2x3-x2)÷(-x)2; (3)化简求值:(a2+b2)(a2-b2)-(a+b)2(a-b)2,其中a=4,b=1. |
以下各式的计算,正确的个数有( ) ①a2•a3=a6;②(2xy2)2=2x2y4;③(-a+b)(b-a)=a2-b2;④(2a-6b)2=4a2-12ab+36b2;⑤(1-3x)(3-x)=3-10x+3x2. |
如果a2-2ab=-10,b2-2ab=16,那么-a2+4ab-b2的值是( ) |
计算: (1)+|-|+(-2)3-+; (2)[x(x2y2-xy)-y(x2-x3y)]÷3x2y. |
最新试题
热门考点