Question

Two students wrote the following numerical expressions.

Angeline: (7 + 15) × (38 + 15)
MeiLing: 15 × (7 + 38)
Are the students’ expressions equivalent to your answer in Problem 4? Explain your answer.

Answer 1

The expression are not equivalent.

Explanation:

For Angeline we have the next process:

`(7+15)*(38+15)=22*53=1166`

For MeiLing we have:

`15*(7+38)=15*45=675`

Then we have that the students expressions are not equivalent.

The process to solver the expressions was solving first the parenthesis and after that solver the multiplication.