Thực hiện phép tính:

1, \(\left(\dfrac{2}{3}-1\dfrac{1}{2}\right):\dfrac{4}{3}+\dfrac{1}{2}\)

2, \(\dfrac{-5}{13}+\dfrac{2}{5}+\dfrac{-8}{13}+\dfrac{3}{5}-\dfrac{3}{7}\)

Câu 1: Số nghịch đảo của \(-1\dfrac{3}{5}\) là

A. \(-\dfrac{5}{2}\)

B. \(\dfrac{8}{5}\)

C. \(\dfrac{-5}{8}\)

D. \(\dfrac{5}{8}\)

Câu 2: Phân số nhỏ nhất trong các số \(\dfrac{-33}{2013};\dfrac{-20}{-19};\dfrac{-3}{61};\dfrac{13}{14}\) là

A. \(\dfrac{-33}{2013}\)

B. \(\dfrac{-20}{-19}\) 

C. \(\dfrac{-3}{61}\)

D. \(\dfrac{13}{14}\)

Rewrite the following sentences without changing their meaning

1. The students were excited about the robotics exhibition.

-> The children found ........................................................

2. I think telling lies to your parents is not good at all.

-> You shouldn't ..............................................................

3. If I'm not busy tomorrow, I will attend the rock concert.

-> Unless ...................................................................

Rewrite the following sentences without changing their meaning

1. It's possible that Andy will go to the amusement park with us 

-> Andy ......................................................

2. I advise you to take off your shoes before you enter a Vietnamese house

-> You ......................................................