Question

1+2-3-4+5+6-7-8+9+10-11-12+..........-299-300+301+302

Answer 1

 1+2-3-4+5+6-7-8+9+10-11-12+13...............-299-300+301+302
= 1 + (2-3-4+5)+(6-7-8+9) + (10-11-12+13)+.......................+(298-299-300+301)+302
= 1 + 0 + 0 + 0 + .......................+ 0 + 302
=  303

 

Answer 2

1+2-3-4+5+6-7-8+9+10-11-12+..........-299-300+301+302

= ( 1 + 2 - 3 ) - ( 4 + 4 + 6 - 7 ) + ............ - ( 299 - 300 + 301 ) + 302

= 0 - 0 + ............. - 0 + 302

= 302

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