Rational and Irrational Number Operations
Algebra 1 · Flashcards
ALGEBRA 1 · FLASHCARDS
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QUESTION
Identify the correct conclusion: if
r
r
r
is rational and
i
i
i
is irrational, what is
i
−
r
i-r
i
−
r
?
QUESTION
Identify the correct classification of
5
+
5
\sqrt{5}+\sqrt{5}
5
+
5
written as
2
5
2\sqrt{5}
2
5
: rational or irrational?
QUESTION
What special case makes
r
i
ri
r
i
rational when
r
r
r
is rational and
i
i
i
is irrational?
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ANSWER
If
r
=
0
r=0
r
=
0
, then
r
i
=
0
ri=0
r
i
=
0
is rational. Zero times any number equals zero, which is rational.
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