7th Grade
Number Systems
Number Systems
What is the absolute value of -7?
7
A letter used to math to represent an unknown amount
Variable
What is the line across a circle going through the center called?
What is the diameter
Simplify the expression:
3x + 5x + 10 - 7
8x + 3
A percent is always out of .....
100
(-4) + (-7) =
-11
A percent that is taken off of the total amount
Discount, Markdown, Sale
What is the line from the center of a circle to a point on the circle called?
radius
Solve the equation.
5x - 4 = 16
x = 4
What is 20% written as a decimal?
.2
(-10) + 15 =
5
A percent that is added to an item, but given to the government
Tax
What is the area of a circle with a radius of 4?
50.24
Simplify the expression:
2(-4x + 5) + 10
-8x + 20
I buy a pair of shoes for $50. If I have to pay an 8% sales tax, how much tax do I pay?
$4
If you multiply or divide with different signs, your answer will be ....
Negative
A positive or negative whole number
Integer
What is the circumference of a circle with a diameter of 8?
25.12
Solve the inequality:
2x + 6 > 10
x > 2
What is 22% of 88, rounded to the nearest whole number?
19
-125 divided by -5
25
The distance around a circle
Circumferece
What is the area of a circle with diameter of 6?
28.26
Oceanside Bike Rental Shop charges $13 up front, plus $9 an hour for renting a bike. Isaac paid $67 to rent a bike. How many hours did he pay to have the bike checked out?
6 hours
I buy a new shirt that originally cost $40 dollars. It is on sale for 20% off. How much do I pay now for the shirt after the discount?
$32
A diver starts at 20 feet below sea level. He dives down 40 feet deeper to see a fish. He then swims back up 15 feet to see a coral reef. Where is his location now?
-45 feet
What is the difference between an algebraic expression and an algebraic equation?
Expression: No equal sign; can only be simplified
Equation: Has an equal sign; can be solved
What is the diameter of a circle that has a circumference of 56.52?
18
The height of a plant is 8 more inches than twice the height of the plant last month. The plant is 32 inches this month. Find the height of the plant last month.
12 inches tall last month
John estimated that he would be $200 on groceries. He actually paid $225. What is the percent error?
11.1% under