Question

Show how the expression should've been simplified using a similar format

Answer 1

Part A:

Let's focus on the following two lines of Jillian's procedure:

`7+3\cdot16,`
`10\cdot16.`

As we can see, she added the 3 and the 7. However, in an arithmetic operation the multiplication takes priority over the addition, and as a result she should have multiplied the 3 and the 16 first before doing the addition.

Part B:

Let's work on simplifying the expression in a similar manner as it was done in the example:

`7+3\cdot(10-6)^2,`
`7+3\cdot(4)^2,`
`7+3\cdot16.`

Now, because of the PEMDAS criteria, we do the multiplication first:

`7+48,`
`55`