# Exercise 4: Properties of addition and multiplication

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Questions #: 6
Time: 10 minutes
Pass Score: 80.0%
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+ y = + x

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#### The associative property of addition using the variables $r$, $s$, and $t$

Complete what is missing

(r + ) + t =  + (s + t)

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· n =  · m

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#### The associative property of multiplication using the variables $x$, $y$, and $z$

( · y) · z = x · (y · )

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#### The associative property of multiplication using the variables $x$, $y$, and $z$

s · 0 = and 0 · s =

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#### The multiplication property of 1 using the variable $b$.

1 · b = and b · 1 =

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