Bài 4: Thực hiện phép tính (hợp lý nếu có thể) :

\((\dfrac{1}{2}-1)(\dfrac{1}{3}-1 )...(\dfrac{1}{2008}-1).(\dfrac{1}{2009}-1)\).

Bài 3:

Bài 2: Thực hiện phép tính:

\(a) \dfrac{-4}{15}+0,25;\)               \(b) 2,5-(\dfrac{-3}{7});\)               \(c) 1\dfrac{1}{4}+3\dfrac{2}{4} ;\)

\(d) \dfrac{-9}{27}-\dfrac{15}{30};\)                 \(e) 1\dfrac{4}{7}:( -1\dfrac{2}{5});\)               \(f) 1\dfrac{3}{8}:( -0,15).\)

Bài 1: Tính bằng cách thuận tiện nhất:

\(a)\) \((4-\dfrac{-3}{5}+\dfrac{2}{3})-(3+\dfrac{1}{5}-\dfrac{5}{3})-(-2+\dfrac{2}{5}+\dfrac{7}{3});\)

\(b) ( 2008-\dfrac{2}{135}+\dfrac{1}{50} )\)\(-( 1-\dfrac{7}{135}+\dfrac{4}{50} )-\)\(( 5+\dfrac{5}{135}+\dfrac{3}{50} ).\)

Viết lại câu:

1. I love swimming with my friends.

→ I am keen_______________________________________________

2. She prefers watching TV.

→ She is crazy_____________________________________________

3. It takes me 20 days to finish the project.

→ I spend_________________________________________________

4. It took us 10 minutes to do the dishes.

→ We____________________________________________________

5. He spends 5 days travelling to Dalat.

→ It takes_________________________________________________

6. Eating too much at the same time causes stomachache. (lead)

→ Eating__________________________________________________

7. Smoking affects our body negatively.

→ Smoking has_____________________________________________

8. It's good idea that you eat more vegetable. (should)

→ You____________________________________________________

Circle the letter A, B, C, or D to indicate the correct answer to each of the following questions.

1. Don't forget to wear suncream or you might get ________.

A. sunbum          B. backache          C. sunlight          D. headache

2. Robert is very fond of ________ models of small planes.

A. to make          B. makes               C. make             D. making

3. My sister's hobby is ________ outdoor activities.

A. do                  B. does                   C. doing            D. done

4. Do not skip breakfast ________ it gives us energy for the day.

A. but                 B. and                     C. because       D. so

5. You should ________ basketball regularly if you want to be taller in the future.

A. take               B. play                     C. do                D. go

6. My parents ________ fishing twice a week.

A. go                  B. are going             C. goes           D. going

7. All the members in my club love ________ a lot of beautiful photos.

A. making           B. drawing               C. taking         D. doing

8. Hoang thinks that playing board games ________ boring.

A. is                    B. are                       C. x                D. very

Choose the correct answers.

1. Everyone needs ________ amounts of energy per day depending on age, size and activity levels.

A. as              B. different          C. same          D. like

2. To lose weight, eat ________ calories than your body bums each day.

A. more          B. further            C. fewer          D. less

3. Lack of vitamin E can cause skin diseases and ________.

A. tiring           B. tire                C. tired             D. tiredness

4. Obesity can ________ the risk of heart disease and diabetes.

A. increase      B. decrease      C. cut               D. get

5. My aunt is a(n) ________. She doesn't have a habit of eating meat.

A. coach          B. vet                C. expert          D. vegetarian

6. It's advisable that you ________ eat more small meals instead of three big meals in a day.

A. should          B. must            C. shouldn't      D. mustn't

7. ________ people do gardening regularly and grow their own fruit and vegetables.

A. Unhealthy     B. Healthily       C. Healthy       D. Health

Fill in the blanks with a suitable preposition.

1. I think you shouldn't eat too much junk food because you are putting ________ weight, Jane.

2. Fish provides omega-3 fatty acids and vitamins such as D and B2 ________ us.

3. Do you have any tips ________ taking care ________ skin ________ acne, Amanda?

4. You should clean ________ your bedroom and change your pillow cover regularly.

5. My mother usually has a bowl of Greek yogurt oatmeal to stay ________ shape.

Match the words or phrases on the left with their meaning on the right.

Choose the word(s) that doesn't belong to the group.

1. A. flu                      B. headache          C. disease         D. fever

2. A. suncream          B. lip balm             C. eyedrops       D. cure

3. A. wear                  B. mask                 C. hat                 D. umbrella

4. A. exercise            B. sleep                 C. outdoor          D. relax

5. A. vegetables        B. lunch box          C. drinks            D. food

6. A. sunburn            B. condition           C. acne              D. chapped skin

7. A. less                   B. eat                    C. more             D. fewer

8. A. active                B. healthy             C. sleepy           D. cook

9. A. clean                 B. mess                C. tidy                D. neat

10. A. spot                 B. pimple              C. skin               D. scar