Name:______________________________________
Period:_____
CS Negative Number Practice
1. Draw a number line that shows the numbers -10 through 10. Label each whole number.
2. Use your number line to help you answer the problems below—check you work with Excel:
a. 2 – 5 =___
b. 5 – 2 =___
c. 4 – 5 =____
d. 3 – -2 =____
e. -4 + 5 =____
f. -4 – -4 =____
g. -9 + 14 =____
Challenge:
•
2 + (4 - 6) =____
•
5 – (3 + -2) = ____
•
(3 – 4) – (8 + -2) = ____
•
(2 – (4 - 8)) + (5 – 9) = ____
Super Challenge (if the front was review for you ☺):
1. As Sven put on his skis for practice, he noticed the temperature was -16 ˚C. After skiing for 4.5
hours, Sven stopped for lunch. He saw the temperature was now -3 ˚C.
a. How much did the temperature change from when Sven began skiing until he stopped for
lunch?
b. What was the average rate of change in the temperature each hour that Sven had been
skiing?
2. Nedda borrowed $20,000 per year for 4 years to study Computer Science in college. After
graduating, she worked as a software engineer for one year, earning $90,000 plus benefits (health
and dental coverage, as well as retirement). She was able to pay off $29,000 of her student loans
after one year of work, but foolishly wasted the rest of her pay on eating sushi every night and a
very expensive apartment.
a. Assuming Nedda has no other assets (stuff that’s worth $) or debts ($ she owes), what is
her net worth after one year of working as a software engineer and paying off part of her
student loans?
b. Nedda works for another year, earning another $90,000 plus benefits, paying off another
$29,000 in student loans. This time, she rents a more reasonable apartment, but blows
most of her money on a brand new Nissan 370Z sports car. She spent $40,000 on the car,
and after one year the car’s value depreciated (decreased/went down) by 19%. Assuming
Nedda has no other assets (besides the car of course) or debts, what is her net worth after
working for a 2nd year as a software engineer, paying off more of her student loans, and
buying the new car?