Предмет: Математика, автор: f1refox74rudanil111

Решите с помощью уравнения задачу
1)Длина линии ABCD равна 3дм 5см. Каждый из отрезков AB и CD имеет длину 1 дм 2 см.Чему равна длина отрезка BC?

2)Длина линии ABCD равна 7дм 2см.Каждый из отрезков AB и CD имеет длину 2 дм 3 см.Найдите длину отрезка BC.

Ответы

Автор ответа: akyla1983
0
1.
1)х-длина отрезка ВС
12+х+12=35
х=35-12-12
х=11 (см) - длина отрезка ВС
Ответ: 11 см (или 1дм 1см) - длина отрезка ВС

2 задача:
.23+х+23=72
х=72-23-23
х=26

Похожие вопросы
Предмет: Математика, автор: kimzhayt
Предмет: Английский язык, автор: ZaBiVnOi1337
ДАЮ 100 БАЛОВ ПОМОГИТЕ ПЛЗ

. Vocabulary. Choose the right adjective of manner.
1. I looked ________ for my keys. *
1 балл
quickly
quietly
easily
slowly
carefully
2. It was so cold so I walked home _______. *
1 балл
quickly
quietly
easily
slowly
carefully
3. We found the address ________. *
1 балл
quickly
quietly
easily
slowly
carefully
4. The baby is sleeping, so please talk _______. *
1 балл
quickly
quietly
easily
slowly
carefully
5. Tina was very tired so she cycled _________. *
1 балл
quickly
quietly
easily
slowly
carefully
II. Grammar. Past Simple vs Past Continuous
Обратите внимание на предложения, нужно выбрать по 2 ответа на каждое предложение. when-когда, while - пока.
1. We ______ when the thieves _____ into the house. *
1 балл
were sleeping
broke
slept
were breaking
2. One thief ______ over while he _______ away. *
1 балл
was falling
ran
was running
fell
3. The police _______ the money while they ________ the garden. *
1 балл
found
were finding
searched
were searching
4. One thief ______ away in a car while the police ________. *
1 балл
weren't looking
was driving
didn't look
drove
III. Reading
Read the story and answer the questions
One day last year , a homeless man, Glen James, found a bag in the door of a shop while he was walking around a shopping centre in Boston. At first , he didn't know what to do, but when he opened the bag he saw it had $40 000 in it so then he took it to the police. Many people thought that Mr James did a wonderful thing. Later, a website decided to raise money to help Mr James because he had no home or job. Finally, they raised over $140 000 from people all over the world. Mr James said " I'm really surprised and so happy. This is going to change my life."
1. What was Glen James doing when he found the bag? *
1 балл
40 000
140 000
was walking around
took it to the police
Другое:
2. What was in the bag? *
1 балл
40 000
140 000
was walking around
took it to the police
3. Who did Mr James give the bag to? *
1 балл
40 000
140 000
was walking around
took it to the police
4. How much did the website raise for Mr James? *
1 балл
40 000
140 000
was walking around
took it to the police