NAME _____________________________________________ DATE ____________________________
PERIOD ____________
Lesson 3 Extra Practice
Add and Subtract Integers
Add or subtract.
1. –7 + (–8)
2. 27 – 49
3. –18 – 14
4. 72 + (–6)
5. –19 – 20
6. 13 – 32
7. 30 + (–53) – 11
8. –4 – 6 + 12
9. –35 – (–7) –18
10. 5 + (–9) + 19
11. –57 – 4 + (–13)
12. 112 – (–4) – 23
13. A scuba diver dives to a depth of 50 feet, then rises 15 feet, sinks 12 feet, then rises 20 feet.
Write an addition expression to describe this situation. Then determine the sum and explain
its meaning.
14. Ralph opened up his checking account with $100. On Monday, he withdrew $45 to purchase
a pair of jeans. On Wednesday, he deposited a $25 check he received for his birthday from
his uncle. On Friday, he used his debit card to buy a $98 football ticket. Write an expression
to describe the total change in Ralph’s checking account balance. Then determine the integer
that represents the final balance.
15. A propeller driven airplane is flying at an altitude of 3,500 feet. It descends 680 feet, and then
ascends 725 feet. Write an expression to represent this situation. Then determine and interpret
the sum.
Course 2 • Chapter 1 Rational Numbers
NAME _____________________________________________ DATE ____________________________ PERIOD _____________
Lesson 3 Problem-Solving Practice
Add and Subtract Integers
1. You purchase a stock in a textile manufacturing
company for $48 per share. On Monday the stock
gained $8, on Tuesday the stock lost $12, and on
Wednesday, the stock lost $2. Write an expression
that represents the opening price of your stock when
the market opens Thursday. Then determine this
value and explain its meaning.
3. A submarine is submerged to a depth of 650 feet
below sea level. It ascends 225 feet and then dives
50 feet. Write an addition expression that represents
the new position of the submarine. Then determine
the position and explain its meaning.
5. Felipe kept track of his earnings and expenses for the
past month. Write an addition expression that
represents the amount of money, if any, he has at the
end of the month. Then determine the amount.
Description
Amount
Babysitting
$30
Car Wash
$25
Movie Tickets
–$24
Pair of Jeans
–$58
Birthday Money
$100
2. The table shows some of the top 10 leaders in a golf
tournament after playing the front 9 holes. Write an
expression that represents the difference between the
scores of the golfer that is in 5th place and the leader.
Then determine this value.
Place
Golfer
Score
1
Murphy
–8
2
Taylor
–6
3
Swanson
–2
4
Connor
1
5
Davidson
3
4. In Louisiana, the highest point of elevation is
Driskill Mountain at 535 feet above sea level, and
the lowest point of elevation is in New Orleans at 8
feet below sea level. Write an expression that
represents the difference between these two
measures. Then determine and interpret the
difference.
6. In Texas, the highest temperature recorded was
120°F on August 12, 1936 in Seymour. The lowest
temperature recorded was −23°F on February 8,
1933 in Seminole. Write an expression that
represents the difference between these two
measures. Then determine and interpret their
difference.
Course 2 • Chapter 1 Rational Numbers