100-(60+20)=
80+(40-20)=
600+(300-100)=
400-(300+100)=​

ответ:1)20

2)100

3)800

4)0

Объяснение:100% дұрыс

ответ: Изи

Объяснение:

20

100

800

0

1. there are many things in this room. there is a table, five chairs, a  piano, a  sofa and two armchairs here. what else is there in this room? there is a bookcase. 2. there is a round table in the corner. there is a piano by the window. there is a vase with flowers on the piano. 3. where is your phone? it is in the office, on the desk. 4. yesterday i received a letter from my brother. there were two pictures of his daughter. 5. there are a lot of students from our institute in this picture. you know many of them. 6. there are drawings but (there are) no maps in the book. 7. look at these pictures. how do you like our city? - it is very nice and clean. i was there a few years ago. 8. do you play the grand piano? come to us on sunday. we have a new grand piano. 9. last week my friend got a new apartment. yesterday we came to see it. it is a very comfortable flat. we liked it very much. there is a living room (they are going to use it as both dining and living room), a bedroom, a bathroom and a kitchen. 10. can i see ivanov? yes, of course. he is in the next room. his desk is to the right of the door.  11. there are many flowers near our house. 12. do you often open the windows in your room? they are usually opened in the morning and in the evening when i'm at home, but they are closed when i'm at work. 13. can i use your phone?