2、( 1/4- 1/2+ 1/6)×24
3、|-5/ 14|×(-3/7)2÷3/ 14
4、2/3+(- 1/5)- 1+ 1/3
5、23+(-73)
6、(-84)+(-49)
7、7+(-2.04)
8、4.23+(-7.57)
9、(-7/3)+(-7/6)
10、- 1+2-3+4-5+6-7;
1 1、- 1+8-7 )23+(-73)
12、(-84)+(-49)
13、7+(-2.04)
14、4.23+(-7.57)
15、(-7/3)+(-7/6)
16、9/4+(-3/2)
17、3.75+(2.25)+5/4
18、-3.75+(+5/4)+(- 1.5)
19、(- 17/4)+(- 10/3)+(+ 13/3)+( 1 1/3)
20、(- 1.8)+(+0.2)+(- 1.7)+(0. 1)+(+ 1.8)+(+ 1.4)
2 1.5/7 × 3/25 + 3/7
22.3/ 14 ×× 2/3 + 1/6
23. 1/5 × 2/3 + 5/6
24.9/22 + 1/ 1 1 ÷ 1/2
25.5/3 × 1 1/5 + 4/3
26.45 × 2/3 + 1/3 × 15
27.7/ 19 + 12/ 19 × 5/6
28. 1/4 + 3/4 ÷ 2/3
29.8/7 × 2 1/ 16 + 1/2
30. 10 1 × 1/5 – 1/5 × 2 1
3 1.50+ 160÷40 (58+370)÷(64-45)
32. 120- 144÷ 18+35
33.347+45×2-4 160÷52
34(58+37)÷(64-9×5)
35.95÷(64-45)
36. 178- 145÷5×6+42 420+580-64×2 1÷28
37.8 12-700÷(9+3 1× 1 1) ( 136+64)×(65-345÷23)
38.85+ 14×( 14+208÷26)
39.(284+ 16)×(5 12-8208÷ 18)
40. 120-36×4÷ 18+35
4 1.(58+37)÷(64-9×5)
42.(6.8-6.8×0.55)÷8.5
43.0. 12× 4.8÷0. 12×4.8
44.(3.2× 1.5+2.5)÷ 1.6
45.6- 1.6÷ 0.5
46.7.2÷0.8- 1.2×5
47.6.5×(4.8- 1.2×4)
48. 10. 15- 10.75×0.4-5.7
49.5.8×(3.87-0. 13)+4.2×3.74
50.32.52-(6+9.728÷3.2)×2.5
5 1.-5+58+ 13+90+78-(-56)+50
52.-7*2-57/(3
53.(-7)*2/( 1/3)+79/(3+6/4)
54. 123+456+789+98/(-4)
55.369/33-(-54-3 1/ 15.5)
56.39+{3x[42/2x(3x8)]}
57.9x8x7/5x(4+6)
58. 1 1x 22/(4+ 12/2)
59.94+(-60)/ 10
60.3.2×( 1.5+2.5)÷ 1.6
6 1.3/7 × 49/9 - 4/3
62.8/9 × 15/36 + 1/27
63. 12× 5/6 – 2/9 ×3
64.8× 5/4 + 1/4
65.6÷ 3/8 – 3/8 ÷6
66.4/7 × 5/9 + 3/7 × 5/9
67.5/2 -( 3/2 + 4/5 )
68.7/8 + ( 1/8 + 1/9 )
69.9 × 5/6 + 5/6
70.3/4 × 8/9 - 1/3
1.a^3-2b^3+ab(2a-b)
2.(x^2+y^2)^2-4y(x^2+y^2)+4y^2
3.(x^2+2x)^2+3(x^2+2x)+x^2+2x+3
4.(a+ 1)(a+2)+(2a+ 1)(a-2)- 12
5.x^2(y+z)^2-2xy(x-z)(y+z)+y^2(x-z)^2
6.3(a+2)^2+28(a+2)-20
7.(a+b)^2-(b-c)^2+a^2-c^2
8.x(x+ 1)(x^2+x- 1)-2
9.9x^2(x- 1)^2-3(x^2-x)-56
10a(a-b)+(a-b)^2
1 1.-ab(a-b)^+a(b-a)^2
12.3(x+2)-2x=5-4x
13.5(x+2a)-a=2(b-2x)+4a
14. It is known that cube of 65438+cube of 0+2+cube of 3+…+cube of 65438 +05 = 14400. Find the value of cube of 2+cube of 4+cube of 6+cube of 30.
15..〔 1.4- (-3.6+5.2) -4.3〕-(- 1.5)
16.5 x-2(x- 1)= 17
2-2(2x-4)=(x-7)
12-2(2x-4)=-x-7
12-2(2x-4)=-(x-7)
7(2x- 1)-3(4x- 1)= 4(3x+2)- 1；
(5y+ 1)+( 1-y)=(9y+ 1)+( 1-3y)；
20%+( 1-20%)(320-x)= 320×40%
23+(-73)
(-84)+(-49)
7+(-2.04)
4.23+(-7.57)
(-7/3)+(-7/6)
9/4+(-3/2)
3.75+(2.25)+5/4
-3.75+(+5/4)+(- 1.5)
( 17/4)+(- 10/3)+(+ 13/3)+( 1 1/3) (2)(- 1.8)+(+0.2)+(- 1.7)+(0. 1)+(+ 1.8)+(+ 1.4)
Known: x =+ 17 (3/4), y =-9 (5/ 1 1), z =-2.25,
23+(-73)+(-50) (-84)+(-49)+30 65+(-52)
3.3ab-4ab+8ab-7ab+ab = _ _ _ Attached are the answers to 50 simplified math evaluation questions in Grade One.
4.7x-(5x-5y)-y=______。
5.23 a3 BC 2- 15 ab2c+8 ABC-24 a3 BC 2-8 ABC = _ _ _ _ _ _。
6.-7x 2+6x+ 13 x2-4x-5x 2 = _ _ _ _ _ _。
7.2y+(-2y+5)-(3y+2)=______。
1 1.(2 x2-3xy+4 y2)+(x2+2xy-3 y2)= _ _ _ _ _ _。
12.2 a-(3a-2 b+2)+(3a-4 b- 1)= _ _ _ _ _ _。
13.-6x2-7x2+ 15x2-2x2=______。
14.2 x-(x+3y)-(-x-y)-(x-y)= _ _ _ _ _ _。
16.2 x+2y-[3x-2(x-y)]= _ _ _ _ _ _。
17.5-( 1-x)- 1-(x- 1)= _ _ _ _ _ _。
18.()+(4xy+7x2-y2)= 10x2-xy。
19.(4xy2-2x2y)-( )=x3-2x2y+4xy2+y3。
2 1. Given A=x3-2x2+x-4 and B=2x3-5x+3, calculate a+b = _ _ _ _.
22. given A=x3-2x2+x-4 and B=2x3-5x+3, calculate a-b = _ _ _ _.
23. If a=-0.2 and b=0.5, the value of the algebraic expression -(|a2b|-|ab2|) is _ _ _ _ _.
25. If a polynomial subtracts 3m4-m3-2m+5 to get -2m4-3m3-2m2- 1, then this polynomial is equal to _ _ _ _.
26.-(2 x2-y2)-[2 y2-(x2+2xy)]= _ _ _ _ _ _。
27. If -3a3b2 and 5ax- 1by+2 are similar terms, then x = _ _ _ _ _, and y = _ _ _ _ _.
28.(-y+6+3 y4-y3)-(2 y2-3 y3+y4-7)= _ _ _ _ _ _。
29. The result of simplifying the algebraic expression 4x2-[7x2-5x-3( 1-2x+x2)] is _ _ _ _.
30.2 a-B2+c-D3 = 2a+()-D3 = 2a-D3-()= c-()。
3 1.3a-(2a-3b)+3(a-2b)-b = _ _ _ _ _ _。
32. The simplified algebraic expression x-[y-2x-(x+y)] is equal to _ _ _ _.
33.[5a 2+()a-7]+[()a2-4a+()]= a2+2a+ 1。
34.3x-[y-(2x+y)]=______。
35.Simplify | 1-x+y |-x-y | (where x < 0, y > 0) equals _ _ _ _.
36. It is known that x≤y, x+y-| x+y-| x-y | = _ _ _ _ _
37. Given x < 0 and y < 0, simplify | x+y |-| 5-x-y | = _ _ _.
38.4a2n-an-(3an-2a2n)=______。
39. If you add -3x2y+2x2-3xy-4 to a polynomial, you get.
2x2y+3xy2-x2+2xy，
Then this polynomial is _ _ _ _.
40.-5xm-xm-(-7xm)+(-3xm)=______。
4 1. When a=- 1 and b=-2,
[a-(b-c)]-[-b-(-c-a)]=______。
43. When a=- 1, b= 1 and c=- 1,
-[b-2(-5a)]-(-3b+5c)=______。
44.-2(3x+z)-(-6x)+(-5y+3z)=______。
45.-5an-an+ 1-(-7an+ 1)+(-3an)= _ _ _ _ _ _。
46.3 a-(2a-4 b-6c)+3(-2c+2b)= _ _ _ _ _ _。
48.9 a2+[7 a2-2a-(-a2+3a)]= _ _ _ _ _ _。
50. When 2y-x=5, 5 (x-2y) 2-3 (-x+2y)-100 = _ _ _.
Xiao Pi wrote a few words himself.
The answer to the first simplified evaluation of mathematics is 1. It is known that A and B are two real roots of the equation x 2+2x-5 = 0.
Find the value of (a 2+2ab+2a) (b 2+2ab+2b).
Derived from the fact that A and B are two real numbers of the equation x 2+2x-5 = 0:
AB=-5，A+B=-2
A^2+2AB+2A)(B^2+2AB+2B)
=AB(A+2B+2)(B+2A+2)
=-5(-2+B+2)(-2+A+2)
=-5AB
=25
2, 1/2(x+y+z) squared+1/2 (x-y-z) (x-y+z)-z (x+y), where x-y=6 and xy=2 1. Be specific.
Simplify:
1/2(x+y+z) squared+1/2 (x-y-z) (x-y+z)-z (x+y) =1
1/2[(x+y) square +2z(x+y)+z square ]+ 1/2[(x-y) square -z square ]-z(x+y)=]
1/2(x+y) square+1/2(x-y) square =x square +y square.
From x-y=6, xy=2 1, x+y = (x-y)+2xy = 78.
3. Find the value of 2ab-2a 2-4b 2-7 from a 2-ab+2b 2 = 3.
2ab-2a^2-4b^2-7
=2(ab-a^2-2b^2)-7
=-2(a^2-ab+2b^2)-7
=(-2)*3-7
=-6-7=- 13
4. If A = 2x 2+3xy-2x-3, B =-x 2+xy+2, and the value of 3A+6B has nothing to do with X, find the value of y..
3a+6b=6x^2+9xy-6x-9-6x^2+6xy+ 12
= 15xy-6x+3
=x( 15y-6)+3
5.9x+6x 2-3 (x-2/3x 2), where x=-2.
9x+6x？ -3(x-2/3x？ )
=9x+6x？ -3x+2x？
=8x？ +6 times
=8×(-2)? +6×(-2)
=32- 12
=20
Senior one has 50 simple math evaluation questions with answers, 4.7x-(5x-5y)-y = _ _ _ _.
5.23 a3 BC 2- 15 ab2c+8 ABC-24 a3 BC 2-8 ABC = _ _ _ _ _ _。
6.-7x 2+6x+ 13 x2-4x-5x 2 = _ _ _ _ _ _。
7.2y+(-2y+5)-(3y+2)=______。
1 1.(2 x2-3xy+4 y2)+(x2+2xy-3 y2)= _ _ _ _ _ _。
12.2 a-(3a-2 b+2)+(3a-4 b- 1)= _ _ _ _ _ _。
13.-6x2-7x2+ 15x2-2x2=______。
14.2 x-(x+3y)-(-x-y)-(x-y)= _ _ _ _ _ _。
16.2 x+2y-[3x-2(x-y)]= _ _ _ _ _ _。
17.5-( 1-x)- 1-(x- 1)= _ _ _ _ _ _。
18.()+(4xy+7x2-y2)= 10x2-xy。
19.(4xy2-2x2y)-( )=x3-2x2y+4xy2+y3。
2 1. Given a = x3-2x2+x-4 and b = 2x3-5x+3, calculate a+b = _ _ _ _.
22. given a = x3-2x2+x-4 and b = 2x3-5x+3, calculate a-b = _ _ _ _.
23. If a =-0.2 and b = 0.5, the value of the algebraic expression -(|a2b|-|ab2|) is _ _ _ _ _.
25. If a polynomial subtracts 3m4-m3-2m+5 to get -2m4-3m3-2m2- 1, then this polynomial is equal to _ _ _ _.
26.-(2 x2-y2)-[2 y2-(x2+2xy)]= _ _ _ _ _ _。
27. If -3a3b2 and 5ax- 1by+2 are similar terms, then x = _ _ _ _ _, and y = _ _ _ _ _.
28.(-y+6+3 y4-y3)-(2 y2-3 y3+y4-7)= _ _ _ _ _ _。
29. The result of simplifying the algebraic expression 4x2-[7x2-5x-3( 1-2x+x2)] is _ _ _ _.
30.2 a-B2+c-D3 = 2a+()-D3 = 2a-D3-()= c-()。
3 1.3a-(2a-3b)+3(a-2b)-b = _ _ _ _ _ _。
32. The simplified algebraic expression x-[y-2x-(x+y)] is equal to _ _ _ _.
33.[5a 2+()a-7]+[()a2-4a+()]= a2+2a+ 1。
34.3x-[y-(2x+y)]=______。
Find 50 simplified math evaluation questions in grade one of junior high school. There are some simple answers about the study of mathematics. From a macro perspective, I think there is a problem of learning progress. I'm talking about liberal arts mathematics. For liberal arts students, because the comprehensive learning task of liberal arts in the early stage of senior three is not very heavy, but in the late stage of the second semester of senior three, its memory needs are very complicated and it needs to occupy most of the learning time, so I think mathematics should be treated differently according to different stages. In the early stage of senior three, that is, the first and second years of senior two, we must allocate more study time to mathematics, because in the college entrance examination, mathematics is a subject with extra points, whether it is liberal arts or science, and we must be inclined when allocating study time. In the second half of the third semester of senior three, because the time spent on comprehensive literature is relatively economical, the score of the college entrance examination can be improved in the end, so it is more appropriate to review once every half hour so as not to get started. I have a strong sensitivity and can keep a very quick response. It takes about half an hour. Don't spend too much time, otherwise it will take up the time to review the comprehensive literature.
10 mathematical simplification evaluation problem 3.3ab-4ab+8ab-7ab+ab = _ _ _.
4.7x-(5x-5y)-y=______。
5.23 a3 BC 2- 15 ab2c+8 ABC-24 a3 BC 2-8 ABC = _ _ _ _ _ _。
6.-7x 2+6x+ 13 x2-4x-5x 2 = _ _ _ _ _ _。
7.2y+(-2y+5)-(3y+2)=______。
1 1.(2 x2-3xy+4 y2)+(x2+2xy-3 y2)= _ _ _ _ _ _。
12.2 a-(3a-2 b+2)+(3a-4 b- 1)= _ _ _ _ _ _。
13.-6x2-7x2+ 15x2-2x2=______。
14.2 x-(x+3y)-(-x-y)-(x-y)= _ _ _ _ _ _。
16.2 x+2y-[3x-2(x-y)]= _ _ _ _ _ _。
17.5-( 1-x)- 1-(x- 1)= _ _ _ _ _ _。
18.()+(4xy+7x2-y2)= 10x2-xy。
19.(4xy2-2x2y)-( )=x3-2x2y+4xy2+y3。
2 1. Given A=x3-2x2+x-4 and B=2x3-5x+3, calculate a+b = _ _ _ _.
22. given A=x3-2x2+x-4 and B=2x3-5x+3, calculate a-b = _ _ _ _.
23. If a=-0.2 and b=0.5, the value of the algebraic expression -(|a2b|-|ab2|) is _ _ _ _ _.
25. If a polynomial subtracts 3m4-m3-2m+5 to get -2m4-3m3-2m2- 1, then this polynomial is equal to _ _ _ _.
26.-(2 x2-y2)-[2 y2-(x2+2xy)]= _ _ _ _ _ _。
27. If -3a3b2 and 5ax- 1by+2 are similar terms, then x = _ _ _ _ _, and y = _ _ _ _ _.
28.(-y+6+3 y4-y3)-(2 y2-3 y3+y4-7)= _ _ _ _ _ _。
29. The result of simplifying the algebraic expression 4x2-[7x2-5x-3( 1-2x+x2)] is _ _ _ _.
30.2 a-B2+c-D3 = 2a+()-D3 = 2a-D3-()= c-()。
3 1.3a-(2a-3b)+3(a-2b)-b = _ _ _ _ _ _。
32. The simplified algebraic expression x-[y-2x-(x+y)] is equal to _ _ _ _.
33.[5a 2+()a-7]+[()a2-4a+()]= a2+2a+ 1。
34.3x-[y-(2x+y)]=______。
35.Simplify | 1-x+y |-x-y | (where x < 0, y > 0) equals _ _ _ _.
36. It is known that x≤y, x+y-| x+y-| x-y | = _ _ _ _ _
37. Given x < 0 and y < 0, simplify | x+y |-| 5-x-y | = _ _ _.
38.4a2n-an-(3an-2a2n)=______。
39. If you add -3x2y+2x2-3xy-4 to a polynomial, you get.
2x2y+3xy2-x2+2xy，
Then this polynomial is _ _ _ _.
40.-5xm-xm-(-7xm)+(-3xm)=______。
4 1. When a=- 1 and b=-2,
[a-(b-c)]-[-b-(-c-a)]=______。
43. When a=- 1, b= 1 and c=- 1,
-[b-2(-5a)]-(-3b+5c)=______。
44.-2(3x+z)-(-6x)+(-5y+3z)=______。
45.-5an-an+ 1-(-7an+ 1)+(-3an)= _ _ _ _ _ _。
46.3 a-(2a-4 b-6c)+3(-2c+2b)= _ _ _ _ _ _。
48.9 a2+[7 a2-2a-(-a2+3a)]= _ _ _ _ _ _。
50. When 2y-x=5, 5 (x-2y) 2-3 (-x+2y)-100 = _ _ _
Hope to adopt
Math Problems in Junior One (Brief Comment) x(x squared -4)-(x+3)(x squared -3x+2)-2x(x-2)
= x(x+2)(x-2)-(x+3)(x-2)(x- 1)-2x(x-2)
=(x-2)(x^2+2x-x^2-2x+3-2x)
=(x-2)(3-2x)
x= 1.5 3-2x=0
therefore
(x-2)(3-2x)=0
Math simplification and evaluation in grade one of junior high school. X (x+2y)-(x+1) 2+2x = x2+2yx-x2-2x-1+2x = x2-x2-2x+2x+2yx-1will be X.
1. Known x+y=5, 2x-y= 1? Simplify xy (the square of x+y? -y squared (xy-x)+2x squared (x-y squared) and find their values.
3.3ab-4ab+8ab-7ab+ab=______。
4.7x-(5x-5y)-y=______。
5.23 a3 BC 2- 15 ab2c+8 ABC-24 a3 BC 2-8 ABC = _ _ _ _ _ _。
6.-7x 2+6x+ 13 x2-4x-5x 2 = _ _ _ _ _ _。
7.2y+(-2y+5)-(3y+2)=______。
1 1.(2 x2-3xy+4 y2)+(x2+2xy-3 y2)= _ _ _ _ _ _。
12.2 a-(3a-2 b+2)+(3a-4 b- 1)= _ _ _ _ _ _。
13.-6x2-7x2+ 15x2-2x2=______。
14.2 x-(x+3y)-(-x-y)-(x-y)= _ _ _ _ _ _。
16.2 x+2y-[3x-2(x-y)]= _ _ _ _ _ _。
17.5-( 1-x)- 1-(x- 1)= _ _ _ _ _ _。
18.()+(4xy+7x2-y2)= 10x2-xy。
19.(4xy2-2x2y)-( )=x3-2x2y+4xy2+y3。
2 1. Given A=x3-2x2+x-4 and B=2x3-5x+3, calculate a+b = _ _ _ _.
22. given A=x3-2x2+x-4 and B=2x3-5x+3, calculate a-b = _ _ _ _.
23. If a=-0.2 and b=0.5, the value of the algebraic expression -(|a2b|-|ab2|) is _ _ _ _ _.
25. If a polynomial subtracts 3m4-m3-2m+5 to get -2m4-3m3-2m2- 1, then this polynomial is equal to _ _ _ _.
26.-(2 x2-y2)-[2 y2-(x2+2xy)]= _ _ _ _ _ _。
27. If -3a3b2 and 5ax- 1by+2 are similar terms, then x = _ _ _ _ _, and y = _ _ _ _ _.
28.(-y+6+3 y4-y3)-(2 y2-3 y3+y4-7)= _ _ _ _ _ _。
29. The result of simplifying the algebraic expression 4x2-[7x2-5x-3( 1-2x+x2)] is _ _ _ _.
30.2 a-B2+c-D3 = 2a+()-D3 = 2a-D3-()= c-()。
3 1.3a-(2a-3b)+3(a-2b)-b = _ _ _ _ _ _。
32. The simplified algebraic expression x-[y-2x-(x+y)] is equal to _ _ _ _.
33.[5a 2+()a-7]+[()a2-4a+()]= a2+2a+ 1。
34.3x-[y-(2x+y)]=______。
35.Simplify | 1-x+y |-x-y | (where x < 0, y > 0) equals _ _ _ _.
36. It is known that x≤y, x+y-| x+y-| x-y | = _ _ _ _ _
37. Given x < 0 and y < 0, simplify | x+y |-| 5-x-y | = _ _ _.
38.4a2n-an-(3an-2a2n)=______。
39. If you add -3x2y+2x2-3xy-4 to a polynomial, you get.
2x2y+3xy2-x2+2xy，
Then this polynomial is _ _ _ _.
40.-5xm-xm-(-7xm)+(-3xm)=______。
4 1. When a=- 1 and b=-2,
[a-(b-c)]-[-b-(-c-a)]=______。
43. When a=- 1, b= 1 and c=- 1,
-[b-2(-5a)]-(-3b+5c)=______。
44.-2(3x+z)-(-6x)+(-5y+3z)=______。
45.-5an-an+ 1-(-7an+ 1)+(-3an)= _ _ _ _ _ _。
46.3 a-(2a-4 b-6c)+3(-2c+2b)= _ _ _ _ _ _。
48.9 a2+[7 a2-2a-(-a2+3a)]= _ _ _ _ _ _。
50. When 2y-x=5, 5 (x-2y) 2-3 (-x+2y)-100 = _ _ _.
3.3ab-4ab+8ab-7ab+ab=______。
4.7x-(5x-5y)-y=______。
5.23 a3 BC 2- 15 ab2c+8 ABC-24 a3 BC 2-8 ABC = _ _ _ _ _ _。
6.-7x 2+6x+ 13 x2-4x-5x 2 = _ _ _ _ _ _。
7.2y+(-2y+5)-(3y+2)=______。
1 1.(2 x2-3xy+4 y2)+(x2+2xy-3 y2)= _ _ _ _ _ _。
12.2 a-(3a-2 b+2)+(3a-4 b- 1)= _ _ _ _ _ _。
13.-6x2-7x2+ 15x2-2x2=______。
14.2 x-(x+3y)-(-x-y)-(x-y)= _ _ _ _ _ _。
16.2 x+2y-[3x-2(x-y)]= _ _ _ _ _ _。
17.5-( 1-x)- 1-(x- 1)= _ _ _ _ _ _。
18.()+(4xy+7x2-y2)= 10x2-xy。
19.(4xy2-2x2y)-( )=x3-2x2y+4xy2+y3。
2 1. Given A=x3-2x2+x-4 and B=2x3-5x+3, calculate a+b = _ _ _ _.
22. given A=x3-2x2+x-4 and B=2x3-5x+3, calculate a-b = _ _ _ _.
23. If a=-0.2 and b=0.5, the value of the algebraic expression -(|a2b|-|ab2|) is _ _ _ _ _.
25. If a polynomial subtracts 3m4-m3-2m+5 to get -2m4-3m3-2m2- 1, then this polynomial is equal to _ _ _ _.
26.-(2 x2-y2)-[2 y2-(x2+2xy)]= _ _ _ _ _ _。
27. If -3a3b2 and 5ax- 1by+2 are similar terms, then x = _ _ _ _ _, and y = _ _ _ _ _.
28.(-y+6+3 y4-y3)-(2 y2-3 y3+y4-7)= _ _ _ _ _ _。
29. The result of simplifying the algebraic expression 4x2-[7x2-5x-3( 1-2x+x2)] is _ _ _ _.
30.2 a-B2+c-D3 = 2a+()-D3 = 2a-D3-()= c-()。
3 1.3a-(2a-3b)+3(a-2b)-b = _ _ _ _ _ _。
32. The simplified algebraic expression x-[y-2x-(x+y)] is equal to _ _ _ _.
33.[5a 2+()a-7]+[()a2-4a+()]= a2+2a+ 1。
34.3x-[y-(2x+y)]=______。
35.Simplify | 1-x+y |-x-y | (where x < 0, y > 0) equals _ _ _ _.
36. It is known that x≤y, x+y-| x+y-| x-y | = _ _ _ _ _
37. Given x < 0 and y < 0, simplify | x+y |-| 5-x-y | = _ _ _.
38.4a2n-an-(3an-2a2n)=______。
39. If you add -3x2y+2x2-3xy-4 to a polynomial, you get.
2x2y+3xy2-x2+2xy，
Then this polynomial is _ _ _ _.
40.-5xm-xm-(-7xm)+(-3xm)=______。
4 1. When a=- 1 and b=-2,
[a-(b-c)]-[-b-(-c-a)]=______。
43. When a=- 1, b= 1 and c=- 1,
-[b-2(-5a)]-(-3b+5c)=______。
44.-2(3x+z)-(-6x)+(-5y+3z)=______。
45.-5an-an+ 1-(-7an+ 1)+(-3an)= _ _ _ _ _ _。
46.3 a-(2a-4 b-6c)+3(-2c+2b)= _ _ _ _ _ _。
48.9 a2+[7 a2-2a-(-a2+3a)]= _ _ _ _ _ _。
50. When 2y-x=5, 5 (x-2y) 2-3 (-x+2y)-100 = _ _ _.
16.2 x+2y-[3x-2(x-y)]= _ _ _ _ _ _。
17.5-( 1-x)- 1-(x- 1)= _ _ _ _ _ _。
18.()+(4xy+7x2-y2)= 10x2-xy。
19.(4xy2-2x2y)-( )=x3-2x2y+4xy2+y3。
2 1. Given A=x3-2x2+x-4 and B=2x3-5x+3, calculate a+b = _ _ _ _.
22. given A=x3-2x2+x-4 and B=2x3-5x+3, calculate a-b = _ _ _ _.
23. If a=-0.2 and b=0.5, the value of the algebraic expression -(|a2b|-|ab2|) is _ _ _ _ _.
25. If a polynomial subtracts 3m4-m3-2m+5 to get -2m4-3m3-2m2- 1, then this polynomial is equal to _ _ _ _.
26.-(2 x2-y2)-[2 y2-(x2+2xy)]= _ _ _ _ _ _。
27. If -3a3b2 and 5ax- 1by+2 are similar terms, then x = _ _ _ _ _, and y = _ _ _ _ _.
28.(-y+6+3 y4-y3)-(2 y2-3 y3+y4-7)= _ _ _ _ _ _。
29. The result of simplifying the algebraic expression 4x2-[7x2-5x-3( 1-2x+x2)] is _ _ _ _.
30.2 a-B2+c-D3 = 2a+()-D3 = 2a-D3-()= c-()。
3 1.3a-(2a-3b)+3(a-2b)-b = _ _ _ _ _ _。
32. The simplified algebraic expression x-[y-2x-(x+y)] is equal to _ _ _ _.
33.[5a 2+()a-7]+[()a2-4a+()]= a2+2a+ 1。
34.3x-[y-(2x+y)]=______。
35.Simplify | 1-x+y |-x-y | (where x < 0, y > 0) equals _ _ _ _.
36. It is known that x≤y, x+y-| x+y-| x-y | = _ _ _ _ _
37. Given x < 0 and y < 0, simplify | x+y |-| 5-x-y | = _ _ _.
38.4a2n-an-(3an-2a2n)=______。
39. If you add -3x2y+2x2-3xy-4 to a polynomial, you get.
2x2y+3xy2-x2+2xy，
Then this polynomial is _ _ _ _.
40.-5xm-xm-(-7xm)+(-3xm)=______。
4 1. When a=- 1 and b=-2,
[a-(b-c)]-[-b-(-c-a)]=______。
43. When a=- 1, b= 1 and c=- 1,
-[b-2(-5a)]-(-3b+5c)=______。
44.-2(3x+z)-(-6x)+(-5y+3z)=______。
45.-5an-an+ 1-(-7an+ 1)+(-3an)= _ _ _ _ _ _。
46.3 a-(2a-4 b-6c)+3(-2c+2b)= _ _ _ _ _ _。
48.9 a2+[7 a2-2a-(-a2+3a)]= _ _ _ _ _ _。
50. When 2y-x=5, 5 (x-2y) 2-3 (-x+2y)-100 = _ _ _.