Question

Tính nhanh các tổng sau :

a) \(\left(5674-97\right)-5674\)

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

Answer 1

a) (5674-97) - 5674

= (5674-5674)-97

= 0-97

= -97

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

= -1075 - 29 + 1075

= (-1075+1075) - 29

= 0 - 29

= -29

Answer 2

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

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

\(=0-97=-97\)

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

=\(-1075-29+1075\)

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

\(=0-29=-29\)

Answer 3

a) ( 5674 - 97 ) - 5674

= 5674 - 97 - 5674

= 5674 - 5674 - 97

= -97

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

= - 1075 - 29 + 1075

= - 1075 + 1075 - 29

= 0 - 29

= 29

Answer 4

a) (5674-97) - 5674

= (5674-5674)-97

= 0-97

= -97

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

= -1075 - 29 + 1075

= (-1075+1075) - 29

= 0 - 29

= -29

Answer 5

a) (5674-97)-5674

= (5674-5674)-97

= 0-97

= -97.

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

= -1075-29-1075

= (-1075+1075)-29

= 0-29

= -29.