Предмет: Математика, автор: sergei903121

7. У бібліотеці на першій полиці
120 книжок, на другій — у 2 рази
більше, ніж на першій, а на третій
у 3 рази менше, ніж на другій. На
скільки книг на третій полиці мен-
ше, ніж на першій?

Ответы

Автор ответа: Cuutee
0

Ответ:

на 40 книжек меньше

Пошаговое объяснение:

на третьей полке х книжек, на второй 3х, на первой 1,5х

т.к. на первой книжке 120, то на второй 240.

на третьей полке 240÷3=80 книжек.

120-80=40

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Раскройте скобки, употребляя глаголы в Present Perfect, Present Simple, Present Continuous, Present Perfect Continuous, Past Simple или Past Continuous.

Переписать все предложения целиком в тетрадь, выделить временные слова—подсказки, формулу времени и кратко в скобочках после каждого предложения написать название времени (Pr.P./Pr.S./Pr.C./Pr.P.C./P.S./P.C).

Например: She always goes to school (Pr.S.).

1.This man (to be) a writer. He (to write) books. He (to write) books since he was a young man. He already (to write) eight books. 2. What you (to do) here since morning? 3. Lena is a very good girl. She always (to help) her mother about the house. Today she (to help) her mother since morning. They already (to wash) the floor and (to dust) the furniture. Now they (to cook) dinner together. 4. He (to run) now. 5. What they (to do) now? — They (to work) in the reading room. They (to work) there for three hours already. 6. With whom you (to discuss) this question yes¬terday? 7. I (to see) this film this week. I like it very much. 8. When I (to enter) the kitchen, my mother (to cut) some cabbage. She (to cook) dinner. 9. They (to go) to the Hermitage last week. 10. After school yesterday he (to come) home, (to have) dinner, (to read) an article from the latest magazine and (to begin) doing his homework.


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