### Home > MC2 > Chapter 5 > Lesson 5.1.3 > Problem5-39

5-39.

What are the differences between the two groups of numbers?

Does it make the equation any easier to solve?

Regrouping simplifies the arithmetic.

First simplify the terms in parentheses.

$4 \frac{1}{2}$

What mathematical actions did Alex take?
What property is this?