Evaluate.
-7.9 - 15.2
A) -7.3
B) -23.1
C) 23.1
D) 7.3

Question

Quizplus · Accepted Answer

When evaluating this expression, we can subtract 15.2 from 7.9. However, since we are subtracting a larger number from a smaller number, the result will be negative. Thus, the answer must be either A or B. However, since the difference between the numbers is 7.3, the answer cannot be -23.1. Therefore, the correct answer is A, -7.3. Subtract 9 from 2 which is not possible, so we have to borrow 1 from 7, which becomes 6 and the 9 becomes 19. Then subtracting 2 from 9, we get 7. 
So, 7.9 - 15.2 = -7.3

Evaluate. -7.9 - 15.2