Предмет: Математика, автор: Oneone11

2 целых 5/8×(5/7-3/5)-9:2 целых 1/4 пожалуйста решите, умоляю срочно

Ответы

Автор ответа: kruglenkonata804
35

2 5/8×(5/7-3/5)-9:2 1/4=-3 7/10

5/7-3/5=(5*5-3*7)/35=4/35

2 5/8*4/35=21/8*4/35=3/10

8:2 1/4=9:9/4=4

3/10-4=3/10-3 10/10=-3 7/10

Автор ответа: Аноним
25

2 \frac{5}{8}  \times ( \frac{5}{7} -  \frac{3}{5}  ) - 9 \div 2 \frac{1}{4}

решаем по действиям :

1) \frac{5}{7}  -  \frac{3}{5}  =  \frac{25}{35}  -  \frac{21}{35}  =  \frac{4}{35}

2)9 \div 2 \frac{1}{4}  = 9 \div  \frac{9}{4}  = 9 \times  \frac{4}{9}  =  \frac{36}{9}  = 4

3)2 \frac{5}{8}  \times  \frac{4}{35}  =  \frac{21}{8}  \times  \frac{4}{35}  =  \frac{84}{240}  =  \frac{3}{10}

4) \frac{3}{10}  - 4 =  \frac{3}{10}  -  \frac{40}{10}  =  -  \frac{37}{10}  =  - 3 \frac{7}{10}

Ответ :

 - 3 \frac{7}{10}

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Помогите мне пожалуйста
A Day in the Life of Simon Carrot

Task I: read & comprehend the following story.

At 12: 30 pm was time for lunch. I was very hun¬gry! I sat down at the table feeling very happy because the Latin lessons were over. And then I saw what was for lunch: meat pie, boiled potatoes and cabbage. I hate vegetables! But I ate a little, because I was so hungry.

Then I went into the playground with my friends Pete Sharp and John Ford and we played football.

After lunch we had a history lesson. I don’t usually like history, but I liked this lesson very much. We learned about the Battle of Hastings in 1066. We were on holiday in Hastings last summer. I said I would bring some photographs of our holiday to school the next week.

At three o’clock it was time for my favourite lesson of the week: games. We played a very exciting game of football but it ended in a draw.

After school at four o’clock, Pete and I bought some sweets and I went to his house to listen to music.

Mum was angry because I didn’t arrive home till half past seven. She doesn`t like when I come home late. My supper was cold.

I did my French homework but I didn’t do my history homework. There was an interesting programme on television.


Task II: decide whether the following sentences are true or false, correct the false ones.

1. He had pancakes with caviar and cream for lunch.

2. He hates vegetables.

3. Simon liked a history lesson very much.

4. He played football with Pete Sharp and John Ford.

5. At two o’clock was his favourite lesson.

6. They played a very exciting game of cricket.

7. Simon went to Pete`s house to play computer games.

8. He did his math homework.


Task III: answer the following questions.

1. What is Simon`s favourite lesson?

2. Why was Simon`s mum angry?

3. Did he do his history homework? Why?