Question

-15.6-(-8.1)

Answer 1

-7.5

Answer 2

0.63-(-9.85)

Answer 3

0.63-(-9.85) is the same as saying 0.63+[-1*(-9.85)

A negative times a negative is a positive.

So you now have this:

0.63+9.85 = answer

Or use a calculator.

Enter .63
subtract key
enter 9.85
change the sign key (+/-)
Equals key