C1  2.8 kilograms

C2  1 hour 45 minutes

Số cây sầu riêng là:

\(1236\times\dfrac{1}{4}=309\) cây

Số cây cà phê là:

\(1236-309=927\)(cây)

Tiếng sóng / vỗ loong boong trên mạn thuyền.

    CN          VN                         TN

C1

B

B

D

C2

\(\dfrac{18}{21}=\dfrac{12}{14}=\dfrac{6}{7}=\dfrac{36}{42}\)

\(\dfrac{90}{150}=\dfrac{12}{20}=\dfrac{60}{100}=\dfrac{3}{5}=\dfrac{21}{35}\)

REFER

Spring is the start of a new year, and it’s also my favorite season.

Spring starts in January and ends in March. In spring, the trees begin to sprout. The flowers in the garden also began to bloom. I love to see the peach blossom in bloom, they act as a sign of Tet. Fluttering butterflies make the garden even more beautiful. The chirping of birds is very funny. Spring weather will be cold, morning has drizzle rain. At noon, there are warm rays of sunshine. The sky is more open, the air is very comfortable.

Spring is also the season of the festival. There are many traditional festivals held during this time. The most especially is Tet. This is a traditional festival in Vietnam. Tet usually takes place in 1 week but It is carefully prepared by people very early. I am looking forward to the Lunar New Year because I will receive the lucky money. I love Tet and spring a lot

792.5

C

hiệu số phần bằng nhau là:

12-1=11 phần

tuổi ông:

77:11x12=84 tuổi

tuổi cháu:

84-77=7 tuổi