Question

1+2-3-4+5+6-7-8+...+98-99-100 ra bao nhieu

Answer 1

1 + 2 - 3 - 4 + 5 + 6 - 7 - 8 + ..+ 98 - 99 - 100

= ( 1 - 2 - 3 + 4 ) + ( 5 - 6 - 7 + 8 ) + .... + ( 97 - 98 - 99 + 100 )

=  0 + 0 + .... + 0 = 0

Answer 2

1 + 2 - 3 - 4 + 5 + 6 - 7 - 8 + .... + 98 - 99 - 100

= ( 1 - 2 - 3 + 4 ) + ( 5 - 6 - 7 + 8 ) + ....+ ( 97 - 98 - 99 + 100 )

= 0 + 0 + ... + 0 = 0

hok tốt