7th Grade Winter Vacation Life Guidance Answers, 7th Grade Math Winter Vacation Life Guidance Answer

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Winter Vacation Homework (1) AnswersOne. Fill-in-the-blank questions.

4."Four digits" 3 or

11. b;a

12. 1;ab

or or 18198 or 192

20.0 or ).

21. ab

2. Multiple choice questions.

23. d24. a

25. c26. d

27. a28. d

Three. Find the least common multiple and the greatest common factor for each of the following groups.

Four. Answer the questions.

So these three numbers are 24, 36, 84 each

So this integer is 43

Winter Vacation Homework (2) AnswersOne. Fill-in-the-blank questions.

1. b;a

8.4 (let the number B be x, then the number A is 6x+2, and the number C is 6(6x+2)+2, so there is x+6x+2+6(6x+2)+2=188, and the solution is x=4).

10.1 and 21; 3 and 19; 5 and 17; 7 and 15; 9 and 13 (choose any three groups) 13Wait.

Two. Multiple choice questions.

1. a;b

2. b(1+2=3)

3. b(3,5,11,17,29)

4. a5. d

6. a7. b

8. b(18+30=48)

9. d(1000-142-76+10=792)10. d ([4,6,8]=24)

Three. Calculation questions.

Four. Answer the questions.

So there are 6 kinds, which are 1 and 90, 2 and 45, 3 and 30, 5 and 18, 6 and 15, 9 and 10

So these two numbers are 4 and 65

So these two numbers are 4 and 105, 12 and 35, 15 and 28, 20 and 215Outline.

So a=3, b=12(2) omitted.

So there are 6 such simplest fractions, (2) 11, 8One case:

Another scenario:

Winter Vacation Homework (3) AnswersOne. Fill-in-the-blank questions.

8.(Let the original fraction be , then there is , and the solution is x=40) two. Multiple choice questions.

18. c19. a

20. c21. c

22. b23. d

24. b( )

Three. Answer the questions.

26. 21n+2(n=1,6,11,16…)27.24's. There are 1, 2, 3, 4, 6, 8, 12, 24 factors, so n has 8, which are 1, 2, 3, 4, 6, 8, 12, 24;

Exists, 1, n=1

So the 115th score is:

Winter Vacation Homework (4) AnswersOne. Fill a vacancy.

3. 35:42:18(a:b=5:6,b:c=7:3)7.Seventy-five ((64-16) 64 100% = 75%)

1. Sheep D is Dolly, Sheep B provides the nucleus for Dolly, Sheep A provides the egg shell for Dolly, and Sheep C provides the uterus for Dolly. Dolly looks like a sheep because Victoria provides the nucleus, which contains genetic material.

2. (1) Phloem sieve tube (2) Xylem duct photosynthesis (3) Cells.

1. (1) Group C. Because there is only one variable in group C (2) control (3) chlorophyll formation in sunlight.

2. (1) Extinguish Without light, plants cannot carry out photosynthesis, but can only respirate and inhale oxygen.

2) Combustion With light and sufficient carbon dioxide, plants can photosynthesize and release oxygen.

3) Extinguish There is only carbon dioxide inside the bottle, and the candle cannot be burned.

1. (1) Transpiration.

2) The stronger the light during the day, the stronger the photosynthesis, and the more organic matter is produced; There is no light at night, only respiration can be carried out, and lowering the room temperature can weaken respiration and reduce the consumption of organic matter.

3) Water, inorganic salts, nutrients, suitable temperature and sufficient air.

4) AA (5) Because there is a lot of organic matter, the respiration is strong, and the more carbon dioxide is exhaled.

2. (1) The amount of oxygen in water.

2) Release oxygen.

3) Because there is no light, plants cannot photosynthesize, and can only respire, inhaling oxygen together with small fish, which accelerates oxygen consumption.

4) Lighting. 5）c d

1. If the flowers are not watered for a long time, the plants cannot carry out photosynthesis and transpiration, and the plants will wilt; Too much watering, poor air circulation, no photosynthesis and respiration. Therefore, the soil should be kept moist and the air should be circulated.

2. It may be algae, because algae plants need sunlight and live in shallow waters.

2) Blisters. 3) Iron hoop The words on the newspaper become larger.