Question

Tính nhanh ( sử dụng quy tắc dấu ngoặc nha )

a) ( 5674 - 97 ) - 5674

b) ( -1075 ) - ( 29 - 1075 )

Help me !

Answer 1

a) ( 5674 - 97 ) - 5674

= ( 5674 - 5674 ) - 97

= 0 - 97

= -97

 

Answer 2

a) \(\left(5674-97\right)-5674\)

\(=5674-97-5674\)

\(=\left(5674-5674\right)-97\)

\(=0-97\)

\(=-97\)

b) \(\left(-1075\right)-\left(29-1075\right)\)

\(=\left(-1075\right)-29+1075\)

\(=\left[\left(-1075\right)+1075\right]-29\)

\(=0-29\)

\(=-29\)

 

Answer 3

a) \(\left(5674-97\right)-5674=5674-97-5674=\left(5674-5674\right)-97=-97\)

b) \(\left(-1075\right)-\left(29-1075\right)=-1075-29+1075=\left(-1075+1075\right)-29=-29\)

Answer 4

Nguyễn Huy Tú