1.1 Integer Opposites
An elevator goes up 7 floors and then down 4 floors. What integer represents the change in the floor level?
3
Write the fraction (7/9) as a decimal.
0.7 repeating
63 - 93 = ?
-30
(-4) * (-5)
20
A volleyball team played five games. In those games, the team won by 7 points, lost by 3 points, lost by 2 points, won by 4, and won by 9. What was the mean difference in scores over the five games?
3 points.
The temperature was -15 degrees Fahrenheit. It rose so that the temperature was 0 degrees Fahrenheit. What integer represents the change in temperature?
15
Write the fraction (5/8) as a decimal.
0.625
-4 + 12
8
(21)/(-7) = ?
-3
The temperature of a pot of water was 180.3 degrees Fahrenheit and cools at a rate of -2.5 degrees Fahrenheit per minute.
What is the temperature after 20 minutes?
130.3 degrees Fahrenheit
A diver is 19 meters below the surface of the water. Use an integer to represent how far the diver will need to travel to reach the surface.
19m
Is 0.040040004... a rational number?
NO!
-8 - (-3) = ?
-5
(2/7) * (-7/9) = ?
(-2/9)
Simplify the expression 2*(2/5) + 2*(-1/5) = ?
0.4 OR (2/5)
Trevor spent $27 and now he has $0 left. He had how much money before his purchase?
$27
Is -12.16161616... rational or irrational?
Rational!
(2/3) + (-1/3) = ?
(1/3)
An elevator steadily descends 500 feet in 20 seconds. How would you express the change in the elevator's height per second?
(-500 * 20) = -10,000 feet
The following are quiz scores for 6 students who studied together in a math class: 3, 4.5, 6.5, 8, 8.5, 10.
What is the median score?
7.25 OR 7 (1/4)
A golfer's score after playing on a Friday was +2. His score for Saturday's round was -5. At the end of his round on Sunday, he was at an even par (or 0). What integer represents the change in the golfer's score from the end of his round on Saturday to the end of his round on Sunday?
3
How do you turn a decimal into a fraction?
Find the place of the decimal and put the numbers over that place (ex: 0.25 --> 25 is in the 100's place so 25/100) and then simplify!
3.5 - (-4.1) = ?
7.6
Can you find the sign of the quotient (-152)/(-8) without preforming the division?
Yes! Two negative integers make a positive integer when dividing or multiplying.
Simplify the expression:
-8(-2.5 - 7) = ?
76