Question

plzzzz answer this.............
plzz.....​

Answer 1

Answer:

1-2+3-4+5-6+999-1000

=-4

I'm not sure. Cause I didn't add the number which was supposed to be in place of the ellipsis.

Step-by-step explanation: Hope it helps..

Answer 2

Step-by-step explanation:

1 - 2 + 3 - 4 + 5 - 6 + 7 + 999 - 1000 = 3

Not sure because as the blank I have used 7 because there was a consecutive order of 123456.. so I used it ... but not confirm