Предмет: Математика, автор: koshka26

Кафель для пола квадратного вида,его длина стороны 30см.Сколько нужно кафеля,для укладки на пол в кухни,где-а)кухонная стена 3метра и 450сантиметров; б)кухонная стена 2 и 3 метра,при этом каждую плитку можно распиливыть только один раз?


koshka26: Помогите плиз

Ответы

Автор ответа: VikaKovaIgov
0

Ответ:

А) 150шт.

Б) 70шт.

Пошаговое объяснение:

А) 3м = 300см

300:30=10

450:30=15

10×15=150 шт.

Б) 3м=300см

2м=200см

300:30=10

200:30=6 2/3

Обрезанные плитки идут по 3-метровой стене, значит нужно 10 обрезанных плиток.

10×6+10=70шт

Похожие вопросы
Предмет: Химия, автор: artemperevalov
Предмет: Английский язык, автор: зайчёёёнок

Everyday English

F Choose the correct response.

36  A: Do you have any idea what dreaming about wild animals means?

B: I can’t say for sure.

     b That can’t be right.

 

38 A: Last night I dreamt that a huge spider was chasing me.

B: That’s a thought!

     b What do you think this means?

 

37 A: Don’t worry, your dream probably means that you’re stressed.

B: Is everything alright?

    b Do you really think so?

 

39 A: I woke up at 2:00 am and couldn’t get back to sleep.

B: Poor you!

     b That’s a relief!

 

 

Grammar

C Put the verbs into the correct past tense.

 

19.   Sandra .................. (paint) for three years before she sold her first painting.

20.   Benjamin .................. (gasp) in horror when he saw the ghostly figure.

21.   It was the first time that Elizabeth .................. (ever/see) pictures of Bigfoot.

22.   Claire .................. (drive) along a country road, when a huge creature came out of nowhere                 and fell onto her car.

23.  The research team .................. (find) an unusual fossil and took it back to the lab to examine   it.

24.   While Lisa .................. (read) a book, her brother was listening to music.

25.   Alex didn’t go to the photographic exhibition

because he .................. (not/finish) his homework.

 

 

 

D Rewrite the sentences using the words in brackets.

e.g. James believed in ghosts when he was a child. (used to)

James used to believe in ghosts when he was a child.

 

26.   In the past, my sister made fun of  Surrealist paintings, but now she loves them. (used to)

.......................................................

28.   Sally visited her grandparents quite often when she still lived in London. (would)

........................................................

.........................................................

27.   Eleanor’s parents never bought her books about monsters when she was a child. (used to)

....................................................

 

29.   When I was still at school, I read a new ghost story every week. (would)

........................................................

........................................................