Positive & Negative Numbers
The temperature is 5°C below zero. Write this as a number.
-5
Which is greater: -3 or -8?
-3
What is |5|?
5
Which inequality matches "x is greater than 4":
x > 4 or x < 4?
x > 4
In the ordered pair (-3, 2), which number is the x-coordinate?
-3
What number is the opposite of 7?
-7
Write these in order from least to greatest: 2, -5, 0, -1
-5, -1, 0, 2
What is |-9|?
9
The solutions to x > -2 include which number: -3, -2, or 0?
0
The point (2, -5) is in which quadrant: I, II, III, or IV?
IV
A submarine is 200 feet below sea level. Write this as a number using "sea level" as 0.
-200
Is -10 to the left or right of -4 on a number line?
left
What does absolute value measure?
The distance from zero that a number is.
Write an inequality for "temperatures below 0°C" using the variable t.
t < 0°C
Two points are (3, 2) and (3, -4). How far apart are they vertically?
6 units
The opposite of the opposite of -8 is what number?
-8
Two temperatures are -2°C and 3°C. Which is warmer? How do you know?
3°C is warmer.
Two numbers have the same absolute value. If one is -6, what is the other?
6
If x > -5, can x be equal to -5? Why or why not?
No.
If a point is reflected across the y-axis, how do its coordinates change? Give an example.
The y stays the same but the x becomes negative.
An elevator is at the ground floor (floor 0). It goes down 3 floors, then up 5 floors. What floor is it on?
2
If you have two negative numbers, which one is always greater: the one closer to zero or the one farther from zero? Give an example.
The one closer to 0.
Which is greater: |-12| or |8|? How do you know?
12
A pool requires swimmers to be at least 5 feet tall. Write an inequality for height h. Is 5 feet exactly a solution?
h ≥ 5; Yes, 5 feet is exactly a solution (at least means ≥)
A rectangle has vertices at (-2, 1), (2, 1), (2, -3), and (-2, -3). What is the length of the longer side?
4 units (it's a square; both sides are 4 units)