Question

I need to fill in the blank and find the property of addition used and in not sure how to do that

Answer 1

To solve this question, let's say the unknown values are x.

Part 01:

$x+0=3$

To solve it, you can use the Identity property.

According to this property, adding 0 to a number does not change the number.

So,

$\begin{gathered} x=3 \\ 3+0=3 \end{gathered}$

Part 02:

$9+2=2+x$

To solve it, you can use the Commutative Property.

According to this property, changing the order of addends does not change the result.

$\begin{gathered} x=9 \\ 9+2=2+9 \end{gathered}$

Part 03:

$3+(5+6)=(3+5)+x$

To solve it, you can use the Associative Property.

According to this property, you can change the grouping of the addends without changing the result.

$\begin{gathered} x=6 \\ 3+(5+6)=(3+5)+6 \end{gathered}$