Question

1 + 2 - 3 + 4 - 4 + 5 -....+999 - 999  = ?

Answer 1

`1+2−3+4−4+5−...+999−999`

`=(1+2)−3+(4−4)+(5−5)+(6−6)+....+(999−999)`

`=3−3+0+0+0+0+...+0`

`=0`

`@Neo`

Answer 2

1 + 2 - 3 + 4 - 4 + 5 - ... + 999 - 999 

= 3 - 3 + 4 - 4 + 5 - ... + 999 - 999

= 0 + 0 + ... + 0

= 0

_{^{(ko chắc lắm)}}

Answer 3

0

Answer 4

Answer 5

`#ava`

`1 + 2 - 3 + 4 - 4 + 5 -....+999 - 999  `

`= 3 - 3 + 4 - 4 + 5 - 5 + .... + 999 - 999`

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

`= 0`