Предмет: Математика, автор: samivip444

из 4т картофеля получают 632 кг крахмала 1)сколько крахмала можно получить из 408т картофеля 2) сколько тонн картофеля надо взять чтобы получить 12640кг крахмала​

Ответы

Автор ответа: markovma74
1

Ответ:

Пошаговое объяснение:

1) составляем пропорцию ( на 4 т. картошки 632 кг. крахмала, ниже 408 т. картошки - х кг. крахмала)

4т. - 632 кг.

408 т. - x кг.

Перемножаем "крест-накрест":

4*x = 632*408

4*x= 257 856

x = 64 464

2) составляем пропорцию (аналогично первому номеру)

4т. - 632 кг.

х кг. - 12640 кг

Перемножаем "крест-накрест":

4*12640 = 632*х

50560 = 632*х

х = 80

Ответ: 1) 64 464 кг. 2) 80 т.

Автор ответа: hopaitora
0

1-408000

2-12,64

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В 1 тонне:1000кг

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They do not need an older person to go with them. Teenagers generally date people of their own age, although girls sometimes date boys two or three years older than they are.

Either a girl or a boy can invite someone on a date. It does not mean that they date regularly only one person. They may go out with one person one week and someone else the next one. Most teenagers go on dates with more than one person. Young people may even date several friends at the same time. Sometimes two couples go together.

Parents very rarely choose dates for their children. Young people usually meet and choose their own dates. Sometimes, however, someone arranges a date for two people who do not know each other.

Boys and girls go to parties together. They go on dates to the cinema, dances, roller skating, etc. A boy often goes to pick up his date at her home. Girls may invite boys to parties or other social events. Hand holding and light kissing in public are common. Anything more than light kissing is not generally approved of in public.

Dating is often very expensive. Today, even the simplest date can cost over $20.00. A couple on a date may go to the movies and have a snack afterwards. Movies now cost $3.00-$ 5.00 per person, and a snack can easily cost more than $ 10.00. The boy and girl often share expensive. Sometimes, however, one person pays for both people.