Kết quả phép tính 99 – 97 + 95 – 93 + 91 – 89 + + 7 – 5 + 3 – 1 là?

up vote 0 down vote favorite

Can you answer this question?


Your Answer

 
 
 
 
 


Not the answer you're looking for? Browse other questions tagged or ask your own question.





1.448114156723