Additive inverse of  -7 is _________.

723 x ( -73 ) - 73 ( - 723 ) = ____.

Additive identity is __________.

Division involving two unlike signs gives a _______.

5 + 3 = ____ + 5.

( - 70 ) x ( -35 ) x 0 x ( - 63 ) = _________.

( -1 ) x ( -7 ) = ________.

Out of -7, -5, -3, 1, 4, 7, find a pair of integers whose sum is -2.

( -3 ) x ( +5 ) = ______.

I was 4 km east of my home. Now I am 3 km west of my home. How many kilometres did I travel ?