Question

Stella rewrites -2 1/2 plus 3.7 using commutative Property of addition. Which expression did she write?

Answer 1

Answer:$3.7-2.5$

Explanations:

The rule for the commutative property of addition is:

a + b = b + a

Stella writes:

$-2\frac{1}{2}\text{ plus 3.7}$

This can be expressed mathematically as:

$-2\frac{1}{2}+3.7$

Which according to the property of commutativity can also be written as:

$\begin{gathered} 3.7\text{ + (-2}\frac{1}{2}) \\ 3.7\text{ - 2}\frac{1}{2} \end{gathered}$

The expression Stella wrote based on the commutative property of addition is therefore:

$\begin{gathered} -2\frac{1}{2}+\text{ 3.7 or} \\ 3.7\text{ - 2.5 (Note that 2}\frac{1}{2}=2.5) \end{gathered}$