Question

The value of 0-1+2-3+4-5+6-7.......... +16-17+18-19+20

Answer 1

Answer:

10

Step-by-step explanation:

+2+4+6 +8 +10 +12+14+16+18 +20 =110

-1-3-5-7-9-11-13-15-17-19=100

110-100

=10

Answer 2

Heya friend ! ☺

> Here's your answer:

0-1+2-3+4-5+6-7.......... +16-17+18-19+20

-(+1+3+5+7+9+11+13+15+17+19)+(2+4+6+8+10+12+14+16+18+20)

=-100+110

=10

________________________

Thank you ! ♠

Doubts are most welcome :)