1. My sister walks to the supermaket.

• My sister goes to the supermarket on foot.

2. There are many flowers in our garden.

• Our garden has many flowers.

3. Does your father cycle to work ?

• Does your father get to work by bike ?

4. The garden is behind Nam's classroom.

•  Nam’s classroom is in front of the garden.

5. Tom drives to work every morning.

• Tom travels to work every morning by car.
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Số HS trung bình là : 270 : 15 . 7 = 126 ( HS)

Số HS còn lại là : 270 - 126 = 144 (HS)

Số Hs khá là : 144 : 8 . 5 = 90 (HS)

a) Số HS giỏi là : 270 - ( 126 + 90 ) = 54 (HS)

b) Tỉ số HS giỏi so với HS toàn khối là : 54 : 270 . 100% = 20%