\(\frac{-1997\cdot1996+1}{-1995\cdot\left(-1997\right)+1996}\)

\(=\frac{-1997\cdot\left(1995+1\right)+1}{1995\cdot1997+1996}\)

\(=\frac{-1997\cdot1995+\left(-1997\right)+1}{1995\cdot1997+1996}\)

\(=\frac{-1997\cdot1995+\left(-1996\right)}{1995\cdot1997+1996}\)

\(=-1\)

\(\frac{-1997.1996+1}{-1995.\left(-1997\right)+1996}\)

\(=\frac{-1997.1996+1}{1995.1997+1996}\)

\(=\frac{-1997.\left(1995+1\right)+1}{1995.1997+1996}\)

\(=\frac{-1997.1995+-1997+1}{1995.1997+1996}\)

\(=\frac{1995.-1997+-1996}{1995.1997+1996}\)

\(=\frac{-\left(1995.1997+1996\right)}{1995.1997+1996}\)

\(=-1\)

gấp là việ của mày chả liên quan đến tao

1995 . 1997 - 5 / 1990 + 1995 . 1996

= 1995 - 5 / 1990

= 1990 / 1990

= 1

x=1005 nha bạn

\(=-1\)

ờ mình cũng vừa nghĩ ra = -1

Mình rút gọn được bằng 1

\(\frac{-1997\cdot1996+1}{-1995\cdot-1997+1996}\)=\(\frac{-1996\cdot1997+1}{1995\cdot1997+1997-1}\)=\(\frac{-1996\cdot1997+1}{\left(1995\cdot1997+1997\right)-1}\)=\(\frac{-1996\cdot1997+1}{1996\cdot1997-1}\)

a: \(=\dfrac{1995\left(1996+1\right)-1}{1996\cdot1995+1994}\)

\(=\dfrac{1995\cdot1996+1995-1}{1996\cdot1995+1994}\)

\(=\dfrac{1995\cdot1996+1994}{1996\cdot1995+1994}=1\)

b: \(=\dfrac{1988\cdot1916+2\cdot1916}{1996\left(1997-1995\right)}\)

\(=\dfrac{1990}{2}=995\)

1 How long do you live in HN

2 How often did you go to the movies

3 What did Mrs Robinson buy

4 When was your father in Nghe An

5 How do they go to school

6 Why didn't she go to class

7 Who left home at 7o'clock yesterday

8 What subject does he study in the high school

9 What is your favorite hobby

10 How far is it

1988 x 1996 + 1997 x 11 + 1985 = 3992000

1988x1996+1997x11+1985=3992000

1988 x 1996 + 1997 x 11 + 1985

=  3968048 + 21967 + 1985 

= 3990015 + 1985 

= 3992000