Question

Below is the work a student completed with an error. Identify the step where the error occurred and give the correct solution. Step 1: (12−20)−3(8−3)+13 Step 2: −8−24−9+13 Step 3: −32−9+13 Step 4: −41+13

Answer 1

the student messed up in step 1 they didn’t do the second set of () the correct solution is 7

Answer 2

Step 2

Explanation:

The student did not distribute the -3 into the parentheses correctly.

(12-20) - 3(8-3) + 13

-8 - 24 + 9 + 13

-3 × 8 = -24

-3 × -3 = 9

For step 2, 9 should be positive instead of negative.

Hope this helps. :)