Question

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

Tell that how the answer is -10. Steps required!​

Answer 1

Answer:

This is how I did

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

= -10

Answer 2

Step-by-step explanation:

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