The seventh grade mathematics first volume Chapter 6 Section 2 Standard examination questions
1. Find similar terms in the following polynomials:
( 1) (2)
(3) (4)
2. Merge the similar items in the following polynomials:
( 1) ; (2)
(3) ; (4)
3. Is it correct to combine the following questions with similar projects? If not, please correct it.
( 1)、
(2)、
(3)、
(4)、
Answer: 1, (1)3x2y, 5x2y；; -4 xy2、2xy2(2)2a2b 、-3 a2b、a2b(3)-a2b、a2b； ab2 、-ab2(4)3x2 、-2x2、x2； 4x 、-x 、-3x
2. (1) a2b (2) a2b (3) a2b (4) 3, (1)(2)(3) Error (4)
The seventh grade mathematics first volume Chapter 6 Section 2 Class 2 Standard Test Paper B
1, find the following' values:
(1) 3c2-8c+2c3-13c2+2c-2c3+3, where c =-4;
(2)3y4-6x3y-4y4+2yx3, where x=-2 and y = 3；;
2. Find the value of the polynomial, where x=-2.
3. Find the value of the polynomial, where a =-3 and b = 2.
Answer: 1, (1)-133 (2)152,33,-19.
The seventh grade mathematics first volume Chapter 6 Section 2 Lesson 2 Standard Test Paper C Volume
1. Fill in the blanks:
(1) If it is similar, then.
(2) If it is similar, then.
(3) If it is similar, then.
2. It is known that and are similar items, and the values are obtained.
3. Take (a+b) and (x-y) as factors to merge similar items in the following categories:
( 1)4(a+b)+2(a+b)-7(a+b)；
(2)3(x-y)2-7(x-y)+8(x-y)2+6(x-y)；
Answer: 1, (1) 2 (2) 4,3 (3) 2,1.
2、9
3 、( 1)-(a+b)(2) 1 1(x-y)2-(x-y)