17/25= 20/25= 24/32= 39/60= 27/75= 6/24=

Это как бы не английский,но

17/25=0,68

20/25=0,80

24/32=0,75

39/60=0,65

27/75=0,36

6/24=0,25

1)=6,8•10в -10 степени=0,68
2)=20:5/25:5=4/5=0,8
3)=24:8/32:8=3/4=0,75
4)=39:3/60:3=13/20=0,65
5)=27:3/75:3=9/25=0,36
6)=6:6/24:6=1/4=0,25

1) Modern operating systems control usage

system equipment, such as a printer and mouse.

2) From a user perspective, PC-DOS and MS-DOS operating systems

identical, with equal capabilities and a set of system commands.

3) OS / 2 is a DOS-compatible operating system that allows

run programs using the graphical user interface.

4) Additional programs for working with system devices

the equipment was very complex and absorbed a lot of time.

5) The operating system also allows you to run programs such as

simple text editor.

6) DOS - the most common operating system for personal

a computer.

Questions for group discussion:

1) Why do you think Bill Gates, President of Microsoft Company is one of the richest

people on the earth?

2) Ask the students in your group who have experience working with Windows 2003

and Windows 2010 about the advantages and disadvantages of these operational

systems.

Объяснение:

Вот перевод

I was happy yesterday morning

2 My brother was sick two days ago

3 They were at the cinema yesterday

4 We were at school an hour ago

5 Kate was at the children’s camp last month

Упражнение 2 Образуйте вопрос с глаголами was were

1 Was he in London last year?

2 Was it sunny two hours ago?

3 Were Kate and Anna at the cinema yesterday?

4 Were they tired last night?

5 Was the breakfast delicious last morning?

Упражнение 3 Заполните пропуски употребив was (were) в нужной форме

1 I was tired last night

2 He was in the garden five minutes ago

3 Children were very friendly yesterday

4 It was very cold yesterday morning

5 We were busy last week

Объяснение: