(14 x 230 + 7 x 540) : 700

= (7 x 2 x 230 + 7 x 540) : 700

=  (7 x 460 + 7 x 540) : 700

=  7 x (460 + 540) : 700

= 7 x 1000 : 700

= 7000 : 700

= 10

. Did you go to the zoo last week, Phong?

2. What did the peacocks do when you were there?

3. She saw two pandas at the zoo.

4. What are your favourite animals at the zoo?

5. The python moved really slowly and quietly.

6. The pandas were really cute and did things slowly.

7..The gorillas was quick moved when Nam at the zoo.

2. I and Hung saw a lot of animals in the circus.

3. Mai liked tiger because they were fast.

4.The mokeys jumped up and very quiickly

Chiều rộng sau khi tăng là:

100%-37,5%=62,5% chiều rộng ban đầu

Chiều dái giảm 37,5% thì chiều rộng phải là

100%:62,5%=1:0,625=1,6=160%

Vậy chiều rộng phải tăng 60%