| 1. |
9 + 3 =
+ 9
|
|
|
order property of addition
grouping property of addition
zero property of addition
|
||
| 2. |
0 + 25 =
|
|
|
order property of addition
grouping property of addition
zero property of addition
|
||
| 3. |
(8 + 12) + 6 =
8 + (12 +
)
|
|
|
order property of addition
grouping property of addition
zero property of addition
|
||