Question

100 + 101 + 102 + 103 +.....+ 1002 + 1003 + 1004 - 10001 + 9999 - 11 = ??????????

Answer 1

100+101+102+103+...+1002+1003+1004-10001+9999-11

=(1004+100).[(1004-100).1+1]:2-10001+9999-11

=1104.905:2-10001+9999-11

=499560-10001+9999-11

=499547

Chúc bạn học giỏi nha!!!

K cho mik với nhé hoang thai minh

Answer 2

100+101+102+103+...+1002+1003+1004‐10001+9999‐11

=﴾1004+100﴿.[﴾1004‐100﴿.1+1]:2‐10001+9999‐11

=1104.905:2‐10001+9999‐11

=499560‐10001+9999‐11 =499547 

k cho em nha mọi người nick ms lập^^