mình thật sự không hiểu j cả

 Tạo Một Dãy Số Biết: Số Đầu Là 3, Số Cuối Là 123, Biết Khoảng Cách Của Các Số Là 3. Hãy Tính Xem Dãy Số Đó Có Bao Nhiêu Số Số Hạng. Số Số Hạng Thứ 15 Là Bao Nhiêu Và Có Chia Hết Cho 5 Hay Không?

IV. Fill in the blank with NO MORE THAN three words from the passage.

My Sunshine school

I am studying at Sunshine secondary school. It is one of the best schools in my city and is famous for good teachers and modern facilities. My school is well-furnished with airy classrooms, modern laboratories and a big library with a huge collection of books. My school is situated between a large park and a swimming pool, so I sometimes play in the park or go swimming with my friends after school. Most students are really hard-working and talented. Our teachers are really strict. They pay high attention to our study results and behaviours. In spite of their strictness, they are fair and caring, so we love our teachers very much. They are very patient to guide us with our homework and help us in times of need.

1. Sunshine secondary school is well-known for __________and modern facilities.

2. Sunshine's library has a big __________ to serve its students.

3. The writer sometimes goes swimming in the __________after school.

4. Teachers at Sunshine care a lot about students' study __________.

5. Sunshine's students really love their teachers because they are __________.

*Đề cương giữa kỳ,mọi người giải nhanh hộ mình cái huhu

Chiều dài :

3/5 x 10/9 = 2/3 m

Diện tích mảnh kính :

3/5 x 2/3 = 0,4 m²

0,4 m² = 4 000 cm²