Question

Leticia simplified an expression. Her work is shown below.

4.5÷1/4+2 1/2-.75×8
Step 1 18+2 1/2-0.75×8
Step 2 18+1.75×8
Step 3 18+14
Step 4 32

Where did Leticia make her first mistake?
step 1
step 2
step 3
step 4

Answer 1

Step 2, she didn't multiply 8 by 0.75.

Hope this helps :)

Answer 2

To prove this, let's take the correct steps:

`4.5/ 1/4+2 1/2-.75* 8 \\ \\ Step \ 1: 18+2 \ 1/2-0.75* 8 \\ \\ Step \ 2:18+2.5-6 \\ \\ Step\ 3:18-3.5 \\ \\Step \ 4:14.5`

As you can see, Leticia makes the first mistake in Step 2, that is, she didn't multiply 8 by 0.75.