1. |
+ 48 = 48
|
|
order property of addition
grouping property of addition
zero property of addition
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||
2. |
67 +
= 9 + 67
|
|
order property of addition
grouping property of addition
zero property of addition
|
||
3. |
38 + (50 + 5) = 38 +
(
+ 50)
|
|
order property of addition
grouping property of addition
zero property of addition
|
||
4. |
53 +
(
+ 21) =
(53 + 7) + 21
|
|
order property of addition
grouping property of addition
zero property of addition
|