2012 Junior 1 Math Winter Vacation Homework Answers 37 40 pages

37 sides. 15 - Option 2 is more profitable. Scenario 1 is 630,000, Scenario 2 is 725,000, and Scenario 3 is 723,600

16 - edge space, word width, word spacing.

17——400 knife holders, 20,000 blades.

39 sides. c d c a b

6 - 48 degrees and 138 degrees.

7-180 degrees.

8 – Regular triangle.

9 - cone.

Uh,38 sides is a small story.,I don't know if the version is the same.,Miss.,If you have a question, continue to ask.,Don't blame me if it's wrong.,I hope it's !!

English is done.

Find the math.

Do you have a question, send it in, I still know a little bit of math in junior high school!

There are only answers to the answer 37 sides: 15: plan 3 810,000 yuan 39 sides: c d c a b 6;48 degrees 138 degrees.

7:180 degrees 8;Regular triangle 9;conical 40 sides; 10；2 12: Sphere.

I'm from Changzhou, and I don't know if the version is different. 14 leaves of math multiple-choice questions 1: b 2:d 3:b 4:b 5:d 6:b 7:b I wrote it myself.

As shown in the figure, the two right angles of the right triangle are 3 cm and 5 cm respectively, and the right triangle row is rotated around the two right angle sides ACBC to form two geometric bodies. Compare the size of the two geometries.

Although I want to help you, my one is published by Shandong Education, and 37 40 pages are biology and information technology.

A minus 2 to the power of 2007 plus 3 times minus 2 to the power of 2006 equals a lot.

No, it won't... I did math and pulled ... Tragedy (cups)...

All right... I need answers, too!! I'm from Shenzhen! I haven't written it so fast...

I'm sorry, but I'm 37 40 pages are politics, you might as well do it yourself.

Hungry Take a picture of the question I first 2 .

I'm also looking for it, I'm from Dalian.

It's so hard ... I need answers, too!!

o ) Oh one didn't do @@

The teacher will scold me to death&&&&

Exercise 1 57 9 Special rectangular phalanxes.

6.$12.

7. 123cm

9.12 books, 23 books.

Exercise 2 1 d

2. d 3. d

4. d 5. d

6. c 7. c 8. d

21.All 8 seats, 5 cars, all 4 seats, 9 cars, 1 x 4 seats, and the remaining 8 seats get a 4 seats, 4 seats 8 seats.

7 4 seats 1 8 seats 7 * 200 + 1 * 300 = 1700 Answer: 1700 yuan 7 4 seats 1 8 seats.

Exercise 3 1 a

2. d 3. a

4. a 5. b

6. c 7. b

8. d 9. a

10. a11. （2a）²

12. 6x-y y+z

13. 5m-4

16.6 or 5

17. 4xy²-xy+8y² -11x-8xy-17y²18. 18a-18b-2

Exercise 4 1 c

2. c 3. c

4. c 5. a

6. c 7. d 8. a

18. k=5/3 x= -29/5

19.A 16 h B 14 h

20. k= k=2/3

Exercise 5 1 d

2. d 3. c

4. a 5. b

6. d 7. b

8. d9.Slightly 4 11

12.Cone.

14.Outline.

16. z+x-2=y

Exercise 6 1 d

2. c 3. b

4. b 5. b

6. b 7. d

14.Parallel because parallel lines parallel to the same plane are parallel to each other.

15. bm=2cm mn=5cm

17.Outline.

18. （1）foe dob (2)aod fob eoc19.Slightly 90°

Exercise VII 1 d

2. b 3. c

4. d 5. b 6. c

8. 3a-2b

9.A cubic + b 2

17. s=a²+b²-[1/2(a+b)b+1/2a²]18. 6km/h

20. 13 2a-b

21.There are 740 yuan for 45 people in the first class and 58 people in the second class to practice eight 1 c

2. c 3. b

4. d 5. a

6. a 7. c 8. d

11.Cone.

21.7 127 144 equal to 507

22.The schoolbag is 92 yuan and the walkman is 360 yuan.

23.Times Supermarket.

25.60° trivia omitted.

Give me more points).

Truex, False, True(10-x-y); x,y,(10-x-y) are integers of 0 10.

10x-6y+3（10-x-y）=77

7x-9y=47

We get x=8 and y=1

True 8 False 1 Half to 1

There are x people. Math 2 3·x+4

Language 2 3.x

All participate in (2 3·x+4)+(2 3·x)+4-x=1 3·x+81 3·x+8=2 3·(2 3·x+4)x=481 3·x+8=24

There were 48 students in the class. The number of participants in both the language and mathematics groups was 24.

3。No. 4。The title is incomplete.

Gold 5x, Silver 6x, Copper (2·5x-5).

3·5x+6x=42

x = 25x = 10, 6x = 12, 2·5x-5 = 15, gold, 10, silver, 12, bronze, 15

x+y=0 y=-x

Substitute separately. 3x+5x=2m ，x=1/4·m2x-7x=m-18，x=（18-m）/51/4·m =（18-m）/5

m=8x=2y=-2

A x people, B y people, C z people.

x+y+z=86

15x：3=12y：2=9z：1

Let 15x:3=12y:2=9z:1=k

x=k/5y=k/6

z=k/9x+y+z=43/90·k=86k=180x=36，y=30，z=20

Follow-up: I want to ask, the 7x and 9y** of the first question are here??

Simplification of 10x-6y+3(10-x-y)=77 gives 7x-9y=47

Follow-up: Okay, got it, thank you! You're so smart!!

Math: Exercise one 45°

Seven-Two-Seven-Two-Six-5

Multiply by 10 to the fifth power.

One-third to the fifth power.

d b a c d b c

0 thirty-seven out of four. Third.

Six hundred and sixty-nine out of two thousand.

**Order: 2 6 2 12 0

Absolute values of a -b.

Exercise two -200000

2 10b a

6ABA115a squared b cubic.

n squared. c c b b b

Nine-fifth-8

50** order: 4 7 10 13 3n 1

333n 1

Exercise 3 4a cube - b cube.

101x to the power of 101.

n (n 1) n to the nth power.

b c d d a b a

5x 5YA squared bc b squared.

3x y 5

x is three-and-a-half x one-half.

2a b c

15x squared.

Makes sense. Exercise 4: 4x=3x-7

Seven out of eight. Two out of nine.

1-2 Five-fourths.

75×12=120x

c a c b b

x=24x=1x=16

x=4(20-x) 12(20-x)

School bag: 92 Walkman: 360

Save more money at home A.

Exercise five -3

5 four-thirds x-6 = x

15（x 2)=330

230c c b b

Half. A:30 B: C:27

A: 300 B: 200

Practice the six balls of the cylinder and the rectangle.

3 1 123 South 57

b a c c b

Slightly 40048

First line, second line, 4 third line

Exercise Seven Myriad One.

8cm、2cm

Vertical 1 2=90°

b c d b a

90°oe⊥of

Four-thirds of the eighths of the exercises. of the sixth power.

b c c b44

6 cob = 40° eob = 130° bof = 100 ° 22560 seats.

1150 (is it?) )

I'm done, but mine is the Soviet version, it's different.

Solution: Let the water consumption in March x cubic meters and the water consumption in April (15-x)m obtain the equation 2*6+4*(x-6)+2*6+4*(15-x-6)=44, and the obtained equation is unsolved, so the water consumption in March is less than 6m, then the equation is 2*x+2*6+4*(15-x-6)=44, and the solution x=2 then the water consumption in April is 13m, and the water consumption in March is 2m

Hope it helps.

Do you still have a winter vacation homework book on the first day of junior high school?

Sorry, I didn't do it, what's the question? Tweet it.

Do it yourself! If you can't cope with your homework, what's the point of copying it to the teacher? It's not cost-effective to lie to yourself, so let's do it yourself.

Solution: Set the water use in March xm3 and the water use in April (15-x) m3.

x>6 15-x>10 x<6 6<15-x<102x+8(15-x-10)+4x4+12=44 2x+4(15-x-6)+12=44

x= x=215-x= 15-x=13

A: Water is used in March and water is used in April.

The water used in March is 2m3, and in April it is 13m3

I don't know if it's right!!

Sorry, our teacher tore that page to tear up the answer.

Can I give me the answers to other multiple-choice questions?

The number of apples in the first, second, third, and fourth piles is x, y, z, px=y+, respectively

With the above, y=2x-1 can be obtained

z=2x+2

p=4x because x+y+z+p=19

So x+(2x-1)+(2x+2)+4x=199x+1=19

9x=18x=2

So x=2, y=3, z=6, p=8

2 in the first pile, 3 in the second pile, 6 in the third pile, and 8 in the fourth pile.

Let the first pile have a; the second pile has b; The third pile has c; There are d in the fourth pile.

From the meaning of the title, 2a=b+1=c-2=1 2d

b=2a-1 c=2a+2 d=4a, so a+b+c+d=a+2a-1+2a+2a+2+4a=9a+1=19, a=2, so b=3; c=6;d=8

So the first pile is 2, the second is 3, the third is 6, and the fourth is 8.

Solution: Let the first pile of apples be x, the second pile of apples should be y, the third pile of apples should be z, and the fourth pile of apples (19-x-y-z) be 2.

List the system of equations: 2x=y+1

z-2=(19-x-y-z)/2②

y+1=z-2③

The solution of this system of equations is: x=2,y=3,z=6,19-x-y-z=8Answer: The first pile of apples is divided into 2, the second pile of apples is divided into 3, the third pile of apples is divided into 6, and the fourth pile of apples is divided into 8.

By the fourth pile is halved and the first pile is doubled, the same can be known that the fourth pile is four times that of the first pile When the second pile increases by one, the second pile is 2 times that of the first pile The third pile decreases by 2 times that of the first pile (19-1+2) (1+2+2+4)=2 = first pile 2*2-1=3=first pile 2*2+2=6=third pile 2*4=8=fourth pile Hope.