1.已知- a2b•mab2=3a3b3,则m等于( )A. B.6 C.- D.-62.单项式4x5y与2x2(-y)3z的积是( )A.8x10y3z B.8x7(-y)4z C.-8x7y4z D.-8x10y3z3.化简x- (x-1)的结果是( )A. x+ B. x- C. x-1 D. x

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/09 09:37:36

1.已知- a2b•mab2=3a3b3,则m等于( )A. B.6 C.- D.-62.单项式4x5y与2x2(-y)3z的积是( )A.8x10y3z B.8x7(-y)4z C.-8x7y4z D.-8x10y3z3.化简x- (x-1)的结果是( )A. x+ B. x- C. x-1 D. x
1.已知- a2b•mab2=3a3b3,则m等于( )
A. B.6 C.- D.-6
2.单项式4x5y与2x2(-y)3z的积是( )
A.8x10y3z B.8x7(-y)4z C.-8x7y4z D.-8x10y3z
3.化简x- (x-1)的结果是( )
A. x+ B. x- C. x-1 D. x+1
4.计算-4a(2a2+3a-1)的结果是( )
A.-8a3+12a2-4a B.-8a3-12a2+1 C.-8a3-12a2+4a D.8a3+12a2+4a
5.下列运算中不正确的是( )
A.3xy-(x2-2xy)=5xy-x2 B.5x(2x2-y)=10x3-5xy
C.5mn(2m+3n-1)=10m2n+15mn2-1 D.(ab)2(2ab2-c)=2a3b4-a2b2c
6.化简 的结果是 ( )
A. B. C. D.
7.下列运算中,正确的是 ( )
A. B.
C. D.
8.一个长方体的长为 mm,宽为100mm,高为 mm,则此长方体的体积为( )
A.B.C.D.
9.若 ,则m+n的值为( )
A.B.1 C.2 D.3
10.若 ,则 的值为( )
A.16 B.0 C.8 D.12
5.2单项式的乘法(一)
1.已知- a2b•mab2=3a3b3,则m等于( )
A. B.6 C.- D.-6
2.单项式4x5y与2x2(-y)3z的积是( )
A.8x10y3z B.8x7(-y)4z C.-8x7y4z D.-8x10y3z
3.化简x- (x-1)的结果是( )
A. x+ B. x- C. x-1 D. x+1
4.计算-4a(2a2+3a-1)的结果是( )
A.-8a3+12a2-4a B.-8a3-12a2+1 C.-8a3-12a2+4a D.8a3+12a2+4a
5.下列运算中不正确的是( )
A.3xy-(x2-2xy)=5xy-x2 B.5x(2x2-y)=10x3-5xy
C.5mn(2m+3n-1)=10m2n+15mn2-1 D.(ab)2(2ab2-c)=2a3b4-a2b2c
6.化简 的结果是 ( )
A. B. C. D.
7.下列运算中,正确的是 ( )
A. B.
C. D.
8.一个长方体的长为 mm,宽为100mm,高为 mm,则此长方体的体积为( )
A.B.C.D.
9.若 则m+n的值为( )
A.B.1 C.2 D.3
10.若 则 的值为( )
A.16 B.0 C.8 D.12

1.已知- a2b•mab2=3a3b3,则m等于( )A. B.6 C.- D.-62.单项式4x5y与2x2(-y)3z的积是( )A.8x10y3z B.8x7(-y)4z C.-8x7y4z D.-8x10y3z3.化简x- (x-1)的结果是( )A. x+ B. x- C. x-1 D. x
1、-a^2b*mab^2=-ma^3b^3=3a^3b^3 所以m=-3 ,
2.4x^5y*2x^2(-y)^3z=-8x^7y^4z 选 C
3、x-(x-1)=x-x+1=1
4、-4a(2a^2+3a-1)=-4a*2a^2-4a*3a+4a=-8a^3-12a^2+4a
5、A 3xy-(x^2-2xy)=3xy-x^2+2xy=-x^2+5xy
B 5x(2x^2-y)=5x*2x^2-5x*y=10x^3-5xy
C 5mn(2m+3n-1)=5mn*2m+5mn*3n-5mn=10m^2n+15mn^2-5mn
D (ab)^2(2ab^2-c)=a^2b^2*2ab^2-a^2b^2c=2a^3b^4-a^2b^2c
选 C
6、
7、
8、
9、
10题目不完整