2022 seventh grade mathematics summer homework reference answers

The long-awaited summer vacation is coming. While we are having fun, don’t forget that we still have a summer homework that has not yet been completed. Below is the 2021 seventh grade mathematics summer homework reference answer template that I have prepared for everyone. Welcome to refer to it.

Seventh grade mathematics summer homework answers

1.

1, B 2, B 3, (1)> (2 )< (3)< 4, 3 5, (1)x-6>2 (2)a+b≥0

2.

1. x≥3 2. x>1.5 3. x<-8/3 4. 2x<-4 5. C 6. C 7. (1)x>6 The number axis is not represented in abbreviated form (2)x>-2 The number axis is represented in a simplified way

8. (1)x>2 The number axis is slightly expressed. (2)x>-2.5 The number axis is expressed slightly. 9. 2≤x<3 The number axis is expressed slightly 10. x>3/11

3.

Operational exploration (1) When x=2, y=15, when x=-2, y=3 (2)-17/8≤x<-1.5 (3)x≤-17/ 8 1. x≤1/2 2. (1) 4000 yuan (2) 5 kinds: ①A 6, B 9; ②A 7 B 8; ③A 8 B 7; ④A 9 B 8; ⑤A 10 B 5 (3)a=300, A 6 B 9 is more advantageous

4.

1. x≤280 2. 137/18>x>137/19 3. 4.5km Operational Exploration (1)C>A>B (2)R>S>P>Q Innovation Stage

When m>n, it is not allowed; when m=n, it does not matter; when m

p>

5.

1. B 2, D 3, (1)a+ab (2)x+y (3)1 (4)ac 4, (1)36a4^4b (Note: 4^4 is the fourth power of 4, which will not be explained later) (2)x(x-9)

5. (1)5x-10y/2x-40 (2)x- 20/130x+24 6. (1)1/3x=4y/12xy, 5/12xy=5x/12xy (2)y/x(x-y)=y-xy/x(y-x) x/(y-x)=x /x(y-x) Innovation stage-7,-7

6.

1.-1 2. 3 3. x 4-6 DAC 7. (1)2/xz (2)10/3a(a+2) Brief operation exploration

7.

1. (1)x=0 (3)x=0 (What about the second question- -) 2, 1/7 3, 34 4. (1)③ (2) Incorrect, the denominator should be retained (3)-2x-6/(x+1)(x-1) Original formula of innovation stage =x+4 ∵(-root number 3)=(root number 3), ∴ correct

8.

1. m>-6 2. Brief experience of 5-yuan perception

< p> 9.

1. y=50/x 2. 3. >2/3 4. m>1/2 5. D 6. B 7. (1) y=-18/ x (2)x=-6 Innovation Stage

10.

1-3 AAD 4. (1)S=100000/d (2)200m (3)6666.67m

11.

1. 24 2. C 3. 10m long and 6m wide innovation booth (1) 30min (2) invalid

12.

1. C 2, D 3. (1) 1: 10000000 (2) 1: 10000000 (3) Unit conversion 4. (1) 1/2, 1/4, 1/2 (2 )AC, DB, CD, AB 5, (1)5/2 (2)5/2 6, (1)8 (2) omitted (hint: DB/AB=2/5, EC/AC=2/5 DB/AB=EC/AC) Innovation Stage 32cm (I don’t know if 2cm and 0.5cm count. Different people have different understandings of this question. It should be okay to write more - -)

Thirteen.

Basic display (1) blind spot (2) cannot.

Blind area (3) Within AB range (4) Slight perception experience 7.6m Brief operation exploration

14.

1-3 CCD 4. 2:1 1:2 5. 12 6. 1 7. (1) 135 square root 8 (2) Similar, the reason is abbreviated and the operation is briefly explored

15.

1-3 CBC 4. ∠ACP=∠ABC 5. 2/5 6. (1) DE=AD, BE=AE=CE (2)△ADE∽△AEC (3)2 Innovation Stage Briefly

16.

1. A 2. D 3. Figure 1 Light center projection; Figure 2 Sunlight parallel projection 4. 6.40m operation research (1) 1.25 (2) 1.5625 (3) y=d/4 (4) 0.4m

Seventeen.

All drawing and reasoning questions, abbreviated

Eighteen.

1. (1)√ (2)× ( 3)√ 2, B 3, A 4. Brief operation and exploration (1) Tips: Do PQ parallel AC (2) Not true (3) ∠PAC=∠APB+∠PBD

19.

1. C 2, C 3, = 4. Unreasonable 5. Inappropriate 6. (1) Correct (2) Correct operation to explore (1) 180° (2) The exterior angles of equal triangles are equal to two non-adjacent ones The sum of the interior angles and the three interior angles of a triangle is 180° Innovation stage e d f

Twenty,

1. C 2. CD 3. Omitted (hint: connect AD) Operational exploration Parallel reasons omitted Innovation stage outline (such as: known (1), (2), (4), verification (3))

Twenty-one,

1, B 2, C 3 , Not the same 4. The probability of not winning is higher if you don’t wait 5. (1) Any number touched is equal (2) It is not equal (3) The equal operation explores whether it falls in the red, green or yellow area

Twenty-two.

1. (1) Equality (2) Unequal extraction of the king (3) Equality operation exploration question 1 Incorrect red ball p (red) = 2/3, p (white) =1/3, ∵p (red) > p (white) ∴ The probability of finding a red ball is high. Question 2. Take out a red ball to experience the experience ① Slightly ② When a > b milk, the amount of soy milk in the cup is when a = b milk There is as much soy milk in the cup as there is milk in the soy milk cup as a

Twenty-three,

1. A 2. 5/8 3. 6/25 4. (1) 1/4 (2) Brief 5, 7/8 1/8 Operational Exploration (1) Brief (2) 1/6

How to write a seventh grade summer vacation plan

1. Chinese : Memorize ancient poems in the first semester of the first grade of junior high school; learn to translate ancient Chinese prose. (Memorize 2 ancient poems in one day. Read one ancient poem in 2 days.)

Studying classics means content and characters. (You can borrow books from the library and learn about the main characters and their deeds)

Read words in the dictionary. (Try to learn a few words every day, mainly some commonly used words. Try to do well in the exam)

2. Mathematics: Preview the entire book.

Preview 1-2 lessons every day. Try to finish the preview during the summer vacation.

3. English: Memorize the words in the entire book.

Memorize 1 unit of words every day, and try to memorize the entire book of words during the summer vacation.

Specific time schedule:

8:00-9:30 Memorize ancient poems and read ancient prose

9:30-11:30 Preview mathematics

11:30-14:00 Eat and rest (you can watch TV and play on the computer)

14:00-15:30 Read words in the dictionary and read books

15:30 -17:30 Read some extracurricular books and English movies, or have outdoor activities with classmates

18:00-19:30 Watch the news broadcast and have dinner

20:00-21: Memorize 30 English words and English texts

21:30-22:00 Writing essays, diaries, reflections, etc. (can be adjusted appropriately)

Summer vacation schedule

Get up at 7:30 (you need to take care of yourself when dressing, folding quilts, and washing)

7:40-8:00 Have breakfast (wash your own dishes)

8:10 —8:30 Read poetry and copy it neatly

8:30-8:55 Outdoor activities (table tennis or badminton) (Saturday and Sunday are outdoor experience activities)

9:00-12:00 Painting (Saturday and Sunday are outdoor experiences or friends gathering activities)

12:00-12:40 Lunch (wash your own dishes)

12:50-15:00 Nap, free reading

15:00-15:40 Watch TV or video games

16:00-17:00 Reading tasks assigned by the teacher (Find out the key points of the storyline, characters and scenery description)

17:00-18:00 Outdoor activities (rope skipping, ball games, skateboarding, bicycles, photography, investigation, etc.)

< p> 18:00-18:30 Dinner

18:30-19:30 Free activities (washing dishes, watching TV, playing games)

19:30-20:00 Outdoor activities (walking or badminton)

20:00-20:30 Reading summary (character description, story changes, key words, good sentences and central points)

20:30- 21:00 Free activities

21:00-21:30 Wash (wash your underwear)

21:30-22:00 Reading and sleeping

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