Question

Perform the following calculations: (-16) - (-42)

Answer 1

Explanation:

The - 42 is going to give trouble.

Two minus signs multiplied together give a plus. In fact any number of even minus signs (2,4,6,8, 1000) multiplied together make a plus.

(-16) + 42 = 26

Answer 2

26

Explanation:

When we subtract a negative it is like adding

(-16) - (-42)

(-16) + (42)

Re arranging the order

42 -16

26