Name:______________________________________________________ Date:____________________________
Adding & Subtracting Rational Numbers
Application Practice
Solve each problem below, showing all work.
1.
In one week Wendy made withdrawals of $45.38, $162.65, $13.00, and $51.99 to pay for
various expenses. She deposited a $150 check and the $22.50 she made babysitting.
What was the net change in Wendy’s account for the week?
45.38+162.65+13.00+ 51.99+150+22.50=445.52 net change in Wendy's account
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2.
A rectangular garden has a length of 7 3/4 ft and a width of 2 1/3 feet. How much fencing
is needed to surround the garden?
9/12 + 4/12= 13/12= 1 1/12 7x2=14
2x2=4
4+14=18+1 1/12=
19 1/12
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3.
The temperature was -4° F at 1:00 AM. It was 11 ° warmer at 2:00 PM and then dropped
back down 16° at midnight. What was the temperature at midnight?
-4+11=7-16=-9
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4.
Paul lost 2 1/2 lb in May, gained 1 1/4 lb in June, lost 1 1/2 lb in July, and lost 2 3/4 lb in August.
What was the net change in Paul’s weight over those 4 months?
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5.
Monique had $14.33 in her wallet. Her mother gave her $5.50 and she found a quarter on
the floor. She owes her friend $20. Does Monique have enough money to pay her friend
back? If so, how much will she have leftover? If not, how much more money does she
need?
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6.
A submarine was 412 ft below sea level. What was the depth of the submarine after it
descended an additional 229 ft?
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