Предмет: Математика, автор: nastyaarbachakova

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Сократите дроби:
1)2/8; 6/9; 4/16; 15/25;
2)15/45; 9/27; 10/100; 24/48;
3)24/32; 40/48; 48/72; 80;64;
4)72/36; 84/20; 100/50; 114/14.
Заранее спасибо)

Ответы

Автор ответа: Аноним
1

Ответ:

Пошаговое объяснение:

1) НОД (2; 8)=2; 2/8=(2÷2)/(8÷2)=1/4

НОД (6; 9)=3; 6/9=(6÷3)/(9÷3)=2/3

НОД (4; 16)=4; 4/16=(4÷4)/(16÷4)=1/4

НОД (15; 25)=5; 15/25(15÷5)/(25÷5)=3/5

2) НОД (15; 45)=15; 15/45=(15÷15)/(45÷15)=1/3

НОД (9; 27)=9; 9/27=(9÷9)/(27÷9)=1/3

НОД (10; 100)=10; 10/100=(10÷10)/(100÷10)=1/10

НОД (24; 48)=24; 24/48=(24÷24)/(48÷24)=1/2

3) НОД (24; 32)=8; 24/32=(24÷8)/(32÷8)=3/4

НОД (40; 48)=8; 40/48=(40÷8)/(48÷8)=5/6

НОД (48; 72)=24; 48/72=(48÷24)/(72÷24)=2/3

Скорее всего здесь дробь 80/64.

НОД (80; 64)=16; 80/64=(80÷16)/(64÷16)=5/4=1 1/4

4) НОД (72; 36)=36; 72/36=2

НОД (84; 20)=4; 84/20=(84÷4)/(20÷4)=21/5=4 1/5

НОД (100; 50)=50; 100/50=2

НОД (114; 14)=2; 114/14=(114÷2)/(14÷2)=57/7=8 1/7

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Тест

1. They …… on rafting in Siberia every summer.

A go B is going C goes D are going

2. Patricia ……to spend more time in the sunshine to be more relaxed.

3. A want B wants C is wanting D have wanted It is the …… film on greenhouse gases which I have ever watched.

A badly B worst C worse D bad

4. When you called me, I …… a book about animals which are under threat of extinction.

A read B will read C was reading D have read

5. Gary was enjoying the scenery while Jane …… the caves.

A explore B had been exploring C had explored D was exploring

6. That was the day …… they took up quad racing .

A where B what C why D when

7. He switched on the computer, connected the Internet and …… the report from the research station.

A readed B had read C read D was reading

8. He wishes he …… a chance to find a part-time job.

A had had B had C will have D was having

9. I …… to attend a concert tonight. Do you want to join me?

A am going B go C will go D went

10. The flowers …… two days ago.

A were planted B are planted C will be planted D have been planted

11. Hurry up! The exhibition …… in an hour.

A closes B will close C is closing D is going to close

12. Hot milk is …… for a sore throat than traditional medicine.

A useful B usefully C most useful D more useful

13. The exam was not easy but the students …… pass it.

A should B were able to C could D had to

14. Bill and Susan …… to Paris in 2014.

A go B have gone C went D had gone

15. The survival course …… I did last year was a bit dangerous.

A why B which C who D when

16. Factories should …… to stop using fossil fuels.

A to try B try C trying D will try

17. When we arrived at the airport, the plane …… off already.

A took B was taking C had been taking D had taken

18. Different social media sites …… every day.

A were used B are used C will be used D have been used

19. I think Steve …… an interesting job and earn a good salary.

A finds B will find C find D is going to find

20. You …… look after children all day. You can hire a babysitter.

A shouldn’t B don’t have to C can’t D mustn’t

21. I …… go out today. I am preparing a presentation on remote regions of Australia.

A can’t B mustn’t C don’t have to D shouldn’t

22. My parents are looking forward to …… on holiday.

A go B going C to go D will go

23. The clerk agreed …… customers as soon as he finishes the report.

A help B to help C helping D will help

24. The spicy food cooked in India …… delicious.

A tastes B taste C is tasting D tasted

25. If Bill had more experience, he …… in the charity campaign.

A participates B would participate C will participate D would have participated

26. Jack …… live in a big city, but now he lives in a village.

A used to B lived C would live D had lived

27. Jack is happy. He finally …… to living in a big city.

A adapts B has adapted C is adapting D has been adapting

28. If you fly this rescue helicopter too often, it …… down faster.

A would break B broke C would have broken D will break

29. Please, turn the radio off. I …… the a difficult maths problem.

A solve B solved C have solved D am solving

30. The scenery is both dark …… beautiful.

A nor B or C and D with
Предмет: Математика, автор: волшебница1997