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Відповідь:
1) (4c+d)*8y=32cy+8dy
2) 7c + 14d = 7(c+2d)
3) 3k - k + 7k = 9k
Похожие вопросы
A. Simple Present-Present Continuous
1. Many birds ______________ (fly) south in winter.
2. Ken ____________ (write) a book about the Aztec Indians. He’ll finish it soon.
3. Mandy usually _____________ (sit) with Sandra during history lessons. But today, Sandra is absent so Mandy ____________ (sit) with Beth.
4. We _____________ (not wear) uniforms to school.
5. “Great John! I ___________ (see) that you __________ (work) very hard, today!”
6. My brother ____________ (not listen) to pop music but today he _______ (listen) to Madonna.
7. I ___________ (not understand) what you _____________(say). Please speak more clearly!
8. I support Greenpeace because I _____________ (believe) in their philosophy.
9. Our teachers ______________________(give) us a test twice a month.
10. “What _____________(you do)?” –“I _____________(taste) the soup to see if it has enough salt.”
B. Simple Present - Present Continuous - Simple Future
1. Be careful! You _____________ (hurt) yourself with that pair of scissors.
2. Come quickly! Look it _____________ (snow) out!
3. I don’t know the answer so I _____________ (look) it up.
4. The buses _____________ (leave) the depot at 9 o’clock every day.
5. When I grow up, I _____________________________(become) an astronaut
6. If you keep on playing with that knife you __________________ (cut) yourself.
7. I ___________________ (wear) my new dress to the party tonight!
8. Jane ________________ (visit) us these days and we __________________ (have) a wonderful time together!
9. Don’t Worry! The plane ____________ (take) off in three hours. We’ve got lots of time!
10.Jenny ________________ (be) back soon. You could wait for her if you like.
C. Simple Past-Past Continuous
1. My father ______________ (take) me to my first football game ten years ago.
2. When I _______________ (arrive) home, Susan ____________________ (cry).
3. Luke and Tony ____________ (fight) over Sheila at the pub last night.
4. I _______________ (write) an email when the dog _______________ (come) in
5. When I was young, my mum ______________ (walk) me to school every morning. In the afternoons, my grandmother _____________ (pick) me up because mum __________ (have) to work.
6. While I ______________ (drive) to work, it ________________ (start) snowing
D. Fill in with the correct form of the Simple Present - Present Continuous - Simple Future - Simple Past-Past Continuous:
1. My father ___________________ us to the park tomorrow. (take)
2. Mary _____________________ her homework for tomorrow. (do)
3. We ___________________ at 17 Barrows Street. (live)
4. They ___________________ for the English test all afternoon yesterday. (study)
5. My mother ___________________ in a nice shop before she got married. (work)
6. We _____________________ the house every afternoon. (clean)
7. “Don’t worry, John, I _______________ up the dry cleaning on the way home. (pick)”
8. I _____________________ China if I win a lot of money. (visit)
9. My brother ___________________to school every morning. (go)
10. As she _____________________ the road, a motorbike hit her. (cross)
11. When she _____________________ here, we’ll ask her about it. (get)
12. I will visit her while I _____________________ in Athens. (be)
13. He _____________________ the rubbish out ten minutes ago. (take)
14. You _____________________ lots of presents for your birthday, didn’t you? (get)
15. I ____________________ you with the laundry if I have time. (help)
E. Choose the correct answer
1.Mr Johns, our history teacher ---- ill all last week.
a) is b) was c) was being
2. I ---- on this report for eight hours last night. I ---- it at three o’clock in the morning!
a) worked, finished b) was working, finished c) was working , was finishing
3. I ___________ to school tomorrow. It’s a holiday
a) am not going b) will not going c) didn’t go
4. “Why are you so tired?” - “Well, I ---- any sleep last night
a) am not getting b) wasn’t getting c) didn’t get
5. Where ---- ?
a) your mum works b) does your mum work c)does your mum works
6. Karen ---- 18 next month.
a) is b) is being c) will be
7. What’s wrong? You --- very upset!
a) look b) are looking c) looked
8. Oh no! It ---- again. We can’t go on our picnic.
a) rains b) rained c) is raining
