Bài 4. Tìm x.
a) 2,9 x + 0,1 x = - 2,7

b) 12,3 : x – 11,55 : x = 15

c) 5,75 x – 2,25 x = - 59,4 – x

Bài 2. Tính hợp lí:
a) 0,125 . 0, 567 . 80

b) 234, 9 . 99 + 234 + 0,9
c) 48 . 2,25 – 2,25 : 0,125

d) 914,75 : 5 + 211,2 : 5 – 101,95 : 5
e) 5,17 : ( -1,3) + 1,43. 1,1 + 39. 0,143 + 7,83 : (-1,3)

XII. Complete the second sentence so that it has a similar meaning to the first sentence, using
the word given (if any). Do not change the word given.

11. People say that crocodile tastes like squid.
-> Crocodile .............................................................................................................................
12. It is said that the Vikings discovered America before Columbus.
-> The Vikings ...........................................................................................................................
13. People think that heart disease is caused by eating the wrong things.
-> Heart disease .........................................................................................................................
14. It is generally said that Christmas is too commercialised.
-> Christmas ...............................................................................................................................
15. People say that Bali is a wonderful island.
-> Bali ..........................................................................................................................................

III. Write sentences in passive:

6. This photo/ take/ my father
.................................................................................................................................
7. It looked like the window/ break/ a hammer/ sometime before.
.................................................................................................................................
8. Our dog/ give/ an injection/ a special syringe/
.................................................................................................................................
9. The winning goal in last night’s match/ score/ Donatello/ a brilliant free kick.
.................................................................................................................................
10. Your cheque/ send/ last Friday/ and/ should/ deliver/ to you tomorrow.
.................................................................................................................................

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