= 63

ngu vcc

10002 

594 chữ số

1. Tom _wasn't_ at home last night. He _went_ to his English club

2. My uncle _is raising_ a lot of chicken and pigs at the moment

3. Where _is your teacher_?

- He is _explaining_ a new lesson in that classroom

4. I _will pick_ you up at your hotel in half an hour

5. _Did Hoa's aunt cook_ dinner yesterday? - Yes, she _did_

6. We _returned_ home late last night

7. Lan always _goes_ to the library to read books

8. When _did you see_ him? - Last Sunday

2²=4

4³=64

suy ra 64x2=128

1. B - for

2. C - on

3. C - how

4. C - doing

5. A - at

6. D - camping

7. C - class

8. B - at

9. C - the most

17. B - same

18. D - at

19. A - have

25. B - science

27. B - never

28. C - physics

33. A - recess

38. B - playing

Ta có : abc1 - 1abc = 7506

=> abc0 + 1 - (1000 + abc) = 7506

=> 10 abc  + 1 - 1000 - abc = 7506

=> (10.abc - abc) + (1 - 1000) = 7506

=> 9.abc - 999 = 7506

=> 9.abc = 7506 + 999 = 8505

=> abc = 8505 : 9

=> abc = 945