Bài 1: Tính

1)-(-8)-9+10+(-14)+(+12)

2)-14+(-13)-(-9)-5

3)-9+17-18+12-23

4)-12+(+14)-17+(-3)

5)-(-17)-(+15)+18-20

6)11-15+13-17+8-4

Bài 8: Bỏ ngoặc rồi tính

1)(-5)+(-18)-(+9)+(+3)

2)-11-(-15)+(-13)-(+9)+(-5)

3)(-4)-(-8)+(-15)+(-10)

4)-(-4)-(-12)-(+5)+19

5)-(+7)-(-12)+(-9)+(+10)

6)-(28-30+4)

7)16-(-3)+(-5)-(+7)+12

8)13-(17-15-3)+(-4+8-9)

I. Fisnish each of the following sentences in such a way that it is as similarly as possible in meaning to the original sentence. Use the word given and other words if necessary. Do not change the form of the given words

1. It's important that you follow all the rules at the national park.    (must)

=..................................................................

2.Ha Long Bay has many islands and caves       (there)

=...........................................................

3.Remember to wear suncream and bring water     (forget)

=....................................................

4.When you want to visit Hue, you must remember to take your umbrella    (important)

=.....................................................

5.It can be quiet  cold at night in Da Lat, so take some warm clothes with you   (because)

=................................................................

6.No take in the word is deeper than Lake Baikal            (deepest)

=............................................................

7.Traveling to the beach is more interesting the traveling to the mountain    (bring)

=................................................................

8.It's very important for you to arrive on time      (must)

=........................................................................

I. Reorger the words and phrases to make meaningful sentences

1. Viet Nam/beautiful/a/Phu Quoc/very/is/island/in/.

2. with white sands/You can see/Viet Nam's prettiest beaches/tropical rainforests/some of/and/.

3. Sa Pa/It's best/Many visitors/during the rainy season/report that/to visit/.

4. excellent/fresh seafood/an/place/This is/to enjoy/.

5. a camera/You mustn't forget/rice paddies/to take/of the/wonderful pictures/.

6. and/there/Tourists/fishing villages/can visit/national parks

II.Rewrite the following sentences, beginning as shown, so that the meaning stays the same

1.Not many people can understand his lecture

=Only.....................................................................................

2. The tour guide tells us not to throw rubbish

=The tour guide says that we..........................................

3.Don't drop litter

=You............................................

4.They don't allow children to travel alone

=Children ..........................................

5.Their rule is wearing a swimsuit in the pool

 =You.............