Question

1+(-1)+2+(-2)+3

Answer 1

1 + ( - 1 ) + 2 + ( - 2 ) + 3

= 0 + 0 + 3

= 3

Answer 2

  [1+(-1)]+[2+(-2)]+3

=0+0+3

=3

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Answer 3

1+(-1)+2+(-2)+3

=0+0+3

=0

Answer 4

1 + ( - 1 ) + 2 + ( - 2 ) + 3

= 1 - 1 + 2 - 2 + 3

= 0 + 0 + 3

= 3

Answer 5

1 + (-1) + 2 + (-2) +3

= 0 + 0 + 3

= 3

Answer 6

1+(-1)+2+(-2)+3

1+(-1)=0

2+(-2)=0

0+0+3

=3

Answer 7

1 + ( - 1 ) + 2 + ( - 2 ) + 3

= [ 1 + ( - 1 ) ] + [ 2 + ( - 2 ) ] + 3

= 0 + 0 + 3

= 3