Transcript 9-2

9-2 Extension: Negative Rational Numbers
Lesson Presentation
9-2 Extension: Negative Rational Numbers
Learn to compare and order negative
rational numbers.
9-2 Extension: Negative Rational Numbers
A rational number
is a number that can
written as a ratio,
with any integer as
the numerator, and
any integer except 0
as the denominator.
9-2 Extension: Negative Rational Numbers
Additional Example 1A: Comparing Negative
Rational Numbers
Use <, >, or = to compare each pair of
numbers.
A.
Write the fractions
using a common
denominator.
Compare.
9-2 Extension: Negative Rational Numbers
Additional Example 1B: Comparing Negative
Rational Numbers
Use <, >, or = to compare each pair of
numbers.
B. –0.5
–3
–0.5
–3.0
Line up the decimal
points and compare
from left to right.
0 is greater than –3.
–0.5 > –3
9-2 Extension: Negative Rational Numbers
Additional Example 1C: Comparing Negative
Rational Numbers
Use <, >, or = to compare each pair of
numbers.
C.
Write –1/2 as a decimal.
–0.5 < –0.3
Compare.
9-2 Extension: Negative Rational Numbers
Check It Out: Example 1A
Use <, >, or = to compare each pair of
numbers.
A.
Write the fractions
using a common
denominator.
Compare.
9-2 Extension: Negative Rational Numbers
Check It Out: Example 1B
Use <, >, or = to compare each pair of
numbers.
B. –0.4
–14
–0.4
–14.0
Line up the decimal
points and compare
from left to right.
0 is greater than –14.
–0.4 > –14
9-2 Extension: Negative Rational Numbers
Check It Out: Example 1C
Use <, >, or = to compare each pair of
numbers.
C.
Write –1/5 as a decimal.
–0.2 = –0.2
Compare.
9-2 Extension: Negative Rational Numbers
Additional Example 2: Ordering Rational
Numbers
Use a number line to write the numbers in
order from least to greatest.
Graph the numbers on a number line.
–3 1/4 –2
–1
0
–5 –4 –3 –2 –1
0
2.2
1
2
3
4
5
9-2 Extension: Negative Rational Numbers
Check It Out: Example 2
Use a number line to write the numbers in
order from least to greatest.
Graph the numbers on a number line.
–4
–4 1/2
–2
–5 –4 –3 –2 –1
0
0
4.2
1
2
3
4
5