Multi-Part Lesson Review
Chapter Study Guide and Review 191Rational Numbers
Terminating and Repeating Decimals (Lessons 1A and 1B)
Write each decimal as a fraction in
simplest form.- 0.7 12. 0.44 13. 0.05
- RUNNING Jeremy ran a mile in 5 minutes
and 8 seconds. Write this time in minutes
as a decimal.
EXAMPLE 1 Write _^2
3 as a decimal.
0.66... Since the pattern
continues to repeat, a
bar is placed over the
6 to indicate it repeats
infinitely. So, _^2
3
= 0. −6.3 2.00
_____ -^18
20- _____ 18
2
Compare and Order Rational Numbers (Lesson 1C)
Replace each ● with <, >, or = to make a
true sentence.- 37.5% ● ^2
3
16. -0.45 ● - ^9
20 - SCHOOL Michael received a _^26
30
on his
English test and an 81% on his biology
test. On which test did he receive the
higher score?
EXAMPLE 2 Replace each ● with <, >,
or = to make 60% ● _^58 a true sentence.Write each as a decimal.60% = 0.6 _^58 = 0.625
Since 0.6 < 0.625, then 60% < _^58.
Lesson 1Add and Subtract Fractions
Add and Subtract Like Fractions (Lesson 2A)
Add or subtract. Write in simplest form.
- _^5
8- ^1
8
19. ^7
12- _^1
12
- _^1
- ^1
- _^5
- _^11
12- ^7
12
21. ^7
9- (- _^4
9
- (- _^4
- ^7
(^) )
EXAMPLE 3 Find _^7
12
- ^5
12
. Estimate ^12 - _^12 = 0
_^7
12- ^5
12
= ^7 -^5
12
Subtract the numerators.
= _^2
12
or _^1
6
Simplify.Add and Subtract Unlike Fractions (Lessons 2B and 2C)
Add or subtract. Write in simplest form.- 97 - 61 23. 54 + 102
- RUNNING Teresa ran ^56 mile while
Yolanda ran ^14 mile. By what fraction
did Teresa run more than Yolanda?
EXAMPLE 4 Find 83 + 32. Estimate 21 + 21 = 1
The LCD of ^38 and ^23 is 24.
_^3
8
_^3 ×^3
8 × 3
_^9
24
+ _^2
3
_^2 ×^8
3 × 8
+ _^16
24
_____ _____
_^25
24
or 1 _ 241Lesson 2190_194_SGR_895130.indd 191 12/31/09 12:51 PM