Предмет: Алгебра, автор: lenkasyper

Помогите! Не было в школе, пропустила тему числовых неравенств, почитав поняла все, но увидела такое неравенство 3,6 меньше 3,(6) что это за 3,(6) такое, зачем скобки и, что значит эта дробь? ( если это вообще дробь)

Ответы

Автор ответа: rubilovalex
1

3,(6)=3,666666. 3,(6)-чисто периодическая дробь. для краткости принято период записывать один раз , заключая его в круглые скобки.

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CHECK YOUR PROGRESS № 1

Read the sentences carefully. Then complete the sentences with the correct words from a, b or c. (1.5 marks each)

1 How often ............................play chess?
a) you b) arc you c) do you

2………………………give me your address, please?
a) Do you b) Can you c) Are you

3 My sister........................get up very early every day.
a) have to b) had to c) has to

4 I...........................a very interesting TV program at the moment,
a) watched b) am watching c) watched

5. Where's my bag? I can't find it……………………………..
a) everywhere b) somewhere c) anywhere

6 'Have you got any CDs?" Yes, ............................
a) we've b) we have c) we've got

7. The story............................to be very long.
a) doesn't have b) hasn't c) can't

8 She always...........................me about her holiday.
a) telling b) tell c) tells

9 'Do you often write to Joey?' Yes,........................
a) I write b) I am c) I do

10 ...........................times a week do you play tennis?
a) How many b) How much c) How often

11…………………………we have to go to the library now?
a) Does b) Can c) Do

12 I've got............................of photos of India.
a) many b) some c) a lot

13 Steve left this book here. It's.............................
a) his b) him c) he's

14 Please be quiet. You............................a terrible noise.
a) make b) making c) are making

15 I'm really hungry but there's............................to eat in the fridge.
a) something b) everything c) nothing

16 We............................the right clothes for tennis.
a) don't wear b) aren't wearing c) doesn't wear

17………………………………fruit on that plate.
a) There's a b) There's some c) There are some

18 He............................very well today.
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19 ..............left this jacket here after the party. Is it yours?

a) Everyone b) No one c) Someone
20 Why............................this book? It's not very interesting.

a) do you read b) are you reading c) you read