Sandra buys three compact discs for $29.95 each. How much change will she receive from $100.

1. Calculate the total price of the three items:

3 * 29.95 = 3(30 - 0.05) = 90 - 0.15 = 89.85

2. Subtract the product ("solution of a multiplication) from the amount payed ($ 100):

100 - 89.85 = 10.15 

3. Stop buying CDs. Use Spotify or sth instead :P

100 - 3(29.95) = $10.15

Nice explanation, Tetration.....

*** Thx :) ***