Question

How do you do 16 * -4 by step by step

Answer 1

16 * -4 = -64

First, 16*4 = 64.

Second, a positive times a negative equals a negative.

Other justification:

   16 x -4 means you add -4 to itself 16 times:

   -4 + -4 + -4 + -4 + ... for a total of 16 times gives you -64.