Kneel and beg for math dignified practice 6th grade p27 p28 answers

5x3/22 x2y3

13m±13n

9a to the n+1 power.

a+b)(a-b)

m+n)(m-n)

m+6)(m-6)

t + 4/5) (t - 4/5).

m+2)(m-2)

y + 1/7) (t + 1/7).

ab+5)(ab-5)

xy + 5/2 A + 4/3 B) (5/2 A - 4/3 B) 2 (1+2x) (1-2x).

3(x+3y)(x-3y)

5a(a+2)(a-2)

7x(2y+x)(2y-x)

2ab(3a+5b)(3a-5b)

2m2 (7n+2m)(7n-2m)

2x-3y)(2x+3y+a)

9x+9y+11m+11n)(9x+9y-11m-11n)x2 +1/9 y2) (x+1/3 y)(x-1/3 y) x2 +y2 +xy)(x2 +y2 -xy)(5m+n)(m+3n).

Let these two consecutive odd numbers be 2x-1 and 2x+1 [(2x-1)+(2x+1)][2x-1)-(2x+1)]=8x to prove true.

2/3 = 5/8 = 11/20

1. Equal. 2. Solve equations.

3. Minus 22 and 1/5

5. y=2, left = -1, right = minus 2/1, left is not equal to right, no.

6. All numbers divided.

7、c8、d

9、b 10、d

It's not good to be found by the teacher

The most precious thing is today, and the easiest thing to lose is also today, and you can't ask the answer on the Internet.

Spend more time thinking about the problem, and directly copying the answer will cost you valuable thinking time.

Satisfactory adoption.

Big brother, there are so many, they will die, and the teacher took it.

Alas, I also have the idea of wanting an answer.

You have to write the question, I don't have a book, otherwise I won't be able to give you the answer!

1/2（ax-5)>x-a

a-2)x>5-2a

A>2: X>(5-2A) (A-2).

When a=2: no solution.

a《Hengku2:x<(5-2a) (a-2)1-2x<3

x>-1

The solutions of inequalities 1 2 (ax-5) > x-a are all solutions of inequalities 1-2x<3.

a>2, (5-2a) (a-2) -1 or a=22 a 31-2x<3, x>-1

1/2(ax-5)>x-a

ax/>x-a

a/2-1)x>

x>-1

A 2-1> this hole 0

Solution (1) Eq. x>(5-2a) (a-2).

(5-2a) (a-2)>=1

5-2a+a-2)/(a-2)>=0

3-a)(a-2)>=0

a-3)(a-2)<=0

2<=a<=3

I don't know if the equations are taught in the sixth grade now (I didn't turn them in at that time), so I give the solution without equations: Take the draw as the benchmark.

For a draw, you have to know 1 point early, which is enough.

Win a game, get 3 points, earn 2 points.

No points for a loss. Lose 1 point.

If it was a draw, it should have scored 9 points, and now it has scored 18 points, earning 9 more points, so 2 points * win - 1 point * loss = 9

2 points * wins = 1 point * losses 9, losses should be odd and less than 9, minus 1, win 5, draw 3

Lose 3, Win 6, Draw 0

If you solve it with equations, it's too easy, I won't write it.

A year ago, the father was 6 times the age of the son, and 10 years later, the father was twice the age of the son.

Untie; After 10 years, the son will be x years old and the father will be 2x years old.

2x-20）=6(x-20)

2x-20=6x-120

4x=100

x=25 this year's son: 25-10=15 (years).

Father of the year; 2x25-10=40 (years).

2.Five students from each class in the sixth grade of the experimental middle school were selected to form a team and held a mathematics competition.

The rules of the competition are: 50 questions are given for each pair, 3 points are awarded for a correct answer, and 1 point is deducted for a question that is not answered or answered incorrectly. If the final score of the third class representative is 142 points, how many questions will the third class representative answer correctly?

50x3=150 (min).

150-142 = 8 (points).

Incorrect: 8 (3+1)=2 (channel).

True: 50-2=48 (channel).

3.Last year, factories A and B completed 120% and 110% of the planned tasks respectively, producing a total of 4,000 tons of food, which was 400 tons more than the sum of the original two factories.

A 120% + B 110% = 4000 (tons).

A 20% + B 10% = 400 (tons).

A 120% + B 60% = 2400 (tons).

B: (4000-2400) x2 = 3200 (tons).

A: (400-3200x10%) 20%)=400 (tons).

Do it yourself.

No one will give it to you

If you can't, you can ask me.

There is definitely no one on the Internet, because even if there are teaching aids like this on the Internet, not many people read them, so of course there will be no answers, and it is very complicated to make e-books, I advise you not to find the answers, do it yourself, don't know how to ask me, I am a second year of junior high school; If you really want to get the answer so that you can check it in time, then go to the bookstore and buy another one, there are many of these books anyway.

Isn't it sold in bookstores, I remember that you can buy it for 4 yuan. Isn't it okay to buy a copy??

It's best not to copy

I'm in the sixth grade, but I've never heard of any classroom exercises, only class exercises.

Also, do you want to copy the answer? Even if you copy it, it's okay to copy one or two questions, you can copy all of them.

You're so greedy.

Do it yourself.

No one will give yo

I'll ask my sister

Why, I've only heard of one lesson and three exercises.

I don't know how to rely on people. If you go on like this, don't think about going to junior high school.

High school.

There is definitely no one on the Internet, because even if there are teaching aids like this on the Internet, not many people read them, so of course there will be no answers, and it is very complicated to make e-books, I advise you not to find the answers, do it yourself, don't know how to ask me, I am a second year of junior high school; If you really want to get the answer so that you can check it in time, then go to the bookstore and buy another one, there are many of these books anyway.

I'll pay for you, you'll have to give me more points, hehe.

You have to write the question, I don't have a book, otherwise I won't be able to give you the answer!

1/2（ax-5)>x-a

a-2)x>5-2a

A>2: X>(5-2A) (A-2).

When a=2: no solution.

A>2: X>(5-2A) (A-2).

1-2x<3

x>-1

The solutions of inequalities 1 2 (ax-5) > x-a about x are all solutions of inequalities 1-2x<3.

a>2, (5-2a) (a-2) -1 or a=2 2 a 3

41-2x<3,x>-1

1/2(ax-5)>x-a

ax/>x-a

a/2-1)x>

x>-1

a/2-1>0

Solution (1) Eq. x>(5-2a) (a-2).

(5-2a) (a-2)>=1

5-2a+a-2)/(a-2)>=0

3-a)(a-2)>=0

a-3)(a-2)<=0

2<=a<=3

I don't know if I teach equations in the sixth grade now (I didn't hand them in at that time), so I don't need to use the solution of the equation:

Based on a draw.

A draw, 1 point, enough to win, 3 points, 2 points to win, no points.

If you lose 1 point, you should get 9 points, and now you have 18 points, and you have earned 9 more points, so 2 points * win - 1 point * loss = 9

2 points * wins = 1 point * losses.

9, the loss should be odd, and less than 9, minus 1, win 5, draw 3

Lose 3, Win 6, Draw 0

If you solve it with equations, it's too easy, I won't write it.

Isn't it sold in bookstores, I remember that you can buy it for 4 yuan. If you want an answer, the answer to p1 24 can be given to you, but ......Add a few more points.

Do it yourself.

No one will give it to you

If you can't, you can ask my sister