Question

100 - 99 + 98 - 97 + ... + 2 - 1

ai nhanh mik k cho

Answer 1

100 - 99 + 98 - 97 + ... + 2 - 1

= ( 100 - 99 ) + ( 98 - 97 ) + ... + ( 2 - 1 )

= 1 + 1 + 1 + 1 + ... + 1 + 1

= 1 . 50

= 50

Answer 2

100 - 98 + 98 - 97 + ...+ 2-1 

= 1 + 1 + ... + 1 

= 1 x 100 

= 100 

h nhé 

thanks