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Tip: The Associative Property says grouping numbers differently won't change the sum.
Level 1: Find the Twin
Which Number Fills the Grouping Twin?
(
4
+
5
)
+
3
=
4
+
(
5
+
?
)
Mental Math Strategy
Which Grouping Makes Addition Easiest?
Add: 7 + 8 + 3
Equivalence Detective
Is this statement TRUE or FALSE?
(6 + 4) + 9 = 6 + (4 + 9)
Interactive Group Experiment
Test Custom Triple Numbers!
(3 + 7) + 4 = 14 ⟺ 3 + (7 + 4) = 14
Notice that both order groupings reach the exact same total: 14!
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Awesome Job!
Because of the Associative Property, grouping doesn't change the final sum.