$$ \left.\begin{array}{l} ext { 1. Commutative Property You can add two numbers in any order. } \ ext { The sum stays the same. For example, } 9.5+21.4=21.4+9.5 ext {. } \ ext { Associative Property You can change the grouping of the addends. } \ (\$ 5.50+\$ 7.83)+\$ 3.50 ext { can be changed to } \ +( \end{array} ight\} $$

Question

$$ \left.\begin{array}{l}	ext { 1. Commutative Property You can add two numbers in any order. } \ 	ext { The sum stays the same. For example, } 9.5+21.4=21.4+9.5 	ext {. } \ 	ext { Associative Property You can change the grouping of the addends. } \ (\$ 5.50+\$ 7.83)+\$ 3.50 	ext { can be changed to } \ +( \end{array}ight\} $$

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The Commutative Property states that the order of addition does not change the sum, like $$9.5 + 21.4 = 21.4 + 9.5$$. The Associative Property allows changing the grouping of addends without changing the sum, as shown in $$(5.50 + 7.83) + 3.50 = 5.50 + (7.83 + 3.50)$$.

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