Предмет: Математика, автор: BoproSsik

Выберите выражение, которое является произведением разности двух чисел на их сумму: 1. а+b*а-b
2. а-b
3. (a-b)*(a+b)
4. a*b

*-умножить

Ответы

Автор ответа: azik603
4
Правильный ответ
3. (a-b)*(a+b)

BoproSsik: Спасибо, а в бы не могли решить ещё тут http://znanija.com/task/12432740
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Choose the proper words, and fill in the blanks (Выберите необходимые слова и заполните пропуски):

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A goes В takes С looks D consists

5. I go to my college ... bus.

A at В by Con D in

6. As to my .... I am slim.

A mother В parents С appearance D father

7. Everybody in our family is easy to get... with.

A each other В along

С others D together

8. We often go ... to the country.

A away В down С off D up

9. The carpet is of the ... colour.

A some В same С more D most

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A shelves В bookcase С wardrobe D furniture


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1.My mother usually ... a lot of time at her job.

A has spent В spends С is spent D was spent

2.As a rule, she ... sweaters for my brother.

A knits В is knit С has knit D had knit

3.Last week we ... our friends to our place.

A invited В have invited С invite D were invited

4.All that morning my brother... computer games.

A is playing В was playing С play D plays

5.We ... our free time together tomorrow.

A spend В spent С will spend D is spent

6.Yesterday we ... by our relatives.

A visited В were visited С was visited D have visited

7.They ... down to the country in two days.

A will go В go С have gone D went

8.I... to music all the evening.

A listen В was listening

С has listening D is listening

9.She ... the dinner not long ago.

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10.She always ...me with my homework.

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4) Answer these multiple-choice questions about your friend

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A a worker В as a worker С a kind man

2. Where does he study?

A at the college В in the street С in one of the houses

3. How many people does his family consist of?

A four relatives В three members С two brothers

4. What is his height?

A 170 cm В 60 kg С 170 kg

5. What is his weight?

A 170 cm В 60 kg С 170 kg

6. Where does he live?

A in the firm В at the firm С in the flat

7. Where does he spend his free time?

A at the disco В at the college С at the school
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