(^) Copyright © Swun Math Grade 8 Unit 1 Lesson 2 C TE
Final Check for Understanding
(Teacher Checks Work)
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Directions: Determine if the number is rational or irrational. Justify your answer.
- √ 6
Solution:
Irrational; on a
calculator, the answer is
2.44948974... which is a
non-terminating
decimal. It does not have
a set pattern. Also, 6 is
not a perfect square.- √ 9
Solution:
Rational; 9 is a perfect
square.3.
0.18181818....Solution:
Rational; it is a repeating
decimal.4.
0.02002000200002...Solution:
Irrational; even though it
looks like a pattern, it is
not a set pattern.
Therefore, it cannot be
considered a rational
number.Considerations:
- Most often, irrational numbers are recorded to the nearest thousandths place.
- Ask and have a conversation of where irrational numbers can be seen in the real-world.
Closure
Recap today’s lesson with one or more of the following questions:
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MP2: How are irrational numbers related to rational numbers?
MP5: Is there a tool you can use to help you find your answer?