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Lesson
Page
Patterns + Functions |
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The
properties
of addition can help you to add quickly and correctly.
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Changing the order of the
addends does not
change the sum.
addend + addend =
sum |
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2 +
4 = 6 |
4
+ 2 = 6 |
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| Think:
"order." Commutative Property |
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Changing the grouping of
the addends does not
change the sum. |
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(2 + 3)
+ 4 = 9 |
2
+ (3 +
4) = 9 |
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5 +
4 = 9 |
2 +
7 = 9 |
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| Think:
"grouping." Associative Property |
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Examples |
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associative
property
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commutative property |
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(1 + 2)
+ 3 |
= 1 + (2
+ 3) |
3 + 5
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= 5 + 3 |
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3
+ 3 |
= 1 +
5 |
3 + 5 = 8
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5 + 3 = 8 |
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6 |
= 6 |
8 |
= 8 |
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Let's Practice!
click
here
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Remember:
Add the
number in parentheses
( ) first. |
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Elementary Test Prep
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