The document discusses three properties of addition:
1) The associative property - The grouping of addends does not change the sum
2) The commutative property - The order of addends does not change the sum
3) The identity property - Adding 0 to a number does not change the number
It provides examples of applying each property to demonstrate that the sum is unchanged regardless of grouping or order of addends.
8. Associative Property
The way in which addends are grouped does
not change the sum.
When you see ( ) parentheses, do the
work within the ( ) first.
9. Associative Property
The way in which addends are grouped does
not change the sum.
When you see ( ) parentheses, do the
work within the ( ) first.
(2 + 3) + 4 =
10. Associative Property
The way in which addends are grouped does
not change the sum.
When you see ( ) parentheses, do the
work within the ( ) first.
(2 + 3) + 4 = 5+4=
11. Associative Property
The way in which addends are grouped does
not change the sum.
When you see ( ) parentheses, do the
work within the ( ) first.
(2 + 3) + 4 = 5+4= 9
12. Associative Property
The way in which addends are grouped does
not change the sum.
When you see ( ) parentheses, do the
work within the ( ) first.
(2 + 3) + 4 = 5+4= 9
2 + (3 + 4) =
13. Associative Property
The way in which addends are grouped does
not change the sum.
When you see ( ) parentheses, do the
work within the ( ) first.
(2 + 3) + 4 = 5+4= 9
2 + (3 + 4) = 2+7=
14. Associative Property
The way in which addends are grouped does
not change the sum.
When you see ( ) parentheses, do the
work within the ( ) first.
(2 + 3) + 4 = 5+4= 9
2 + (3 + 4) = 2+7= 9
31. Name the property used.
Identity Property
See the zero?
76 + 0 = 76
76 + 17 = 17 + 76
(6 + 4) + 8 = 6 + (4 + 8)
32. Name the property used.
Identity Property
See the zero?
76 + 0 = 76 Commutative
See the numbers
76 + 17 = 17 + 76 switched?
(6 + 4) + 8 = 6 + (4 + 8)
33. Name the property used.
Identity Property
See the zero?
76 + 0 = 76 Commutative
See the numbers
76 + 17 = 17 + 76 switched?
(6 + 4) + 8 = 6 + (4 + 8)
Associative Property
6 + 4 is added first and 4 + 8 was added first
Sum did not change.