Answers

2016-04-08T11:36:14+05:30
Yes it is true as minus and minus is always plus


1 5 1
yes its ture because negative x negative = positive
2016-04-08T11:37:23+05:30
True
because
5-(-8)                      (negative x negative = positive)
=5+8 = 13

5+8 =13

1 5 1