Question

1-2-3+4+5-6-7+8+.....-119+120

 

Answer 1

1 - 2 - 3 + 4 + 5 - 6 - 7 + 8 + .......... - 119 + 120

= ( 1 - 2 - 3 + 4 ) + ( 5 - 6 - 7 + 8 ) + ............. + ( 117 - 118 - 119 + 120 )

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

= 0

Answer 2

là 0 đúng rồi đấy 

Answer 3

1-2-3+4+5-6-7+8+...-119+120

=( 1-2-3+4 ) + ( 5-6-7+8 ) +...+ (117-118-119+120 )

=0                + 0                +...+ 0

=0

Answer 4

1-2-3+4+5-6-7+8+.....-119+120

=>= ( 1 - 2 - 3 + 4 ) + ( 5 - 6 - 7 + 8 ) + ............. + ( 117 - 118 - 119 + 120 )

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

= 0

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Answer 5

http://sta.santruyen.com/medias/avatars/51/51125.png?time=1516415897