Question

10 - 25 - 6 + (-2)

-15 - 6+(-2) Step 1
-9 +(-2) Step 2
-11 Step 3
Which of the following best describes Marissa's mistake?

Answer 1

Mistake is found in step 2 where the person did their math wrong. You see -15-6 is another way of saying -15 + -6 because of Keep Change Change (KCC). So, -15+-6= -21 and then add it to -2, which gives us -23.