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7th grade STAAR quick review
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quick review for STAAR
Key Concepts:
Terms in this set (58)
Common Denominators
To add and subtract fractions you need have...
Improper Fractions
Before you multiply and divide fractions you must convert mixed numbers to?
divide the numerator by denominator
To change a fraction to a decimal you?
move decimals two places to the right
To change a decimal to a percent you?
move decimal two places to the left
To change a percent to a decimal you?
Complementary Angles
Angles whose sum equals 90 degrees are called?
Supplementary Angles
Angles whose sum equals 180 degrees are called?
multiply by .25
To find 25% of a number you can?
multiply by .15
To find 15% of a number you can?
positive
multiply or divide two negatives and you get a?
Negative
multiply or divide one positive and one negative you get a?
Area of the base shape
What is "Capital B" in the volume formula?
isosceles triangle
What is a triangle with 2 congruent sides?
36
what is 6 squared?
9
what is the square root of 81?
Cross multiply then divide
How do you solve proportions?
parentheses
What comes first in order of operations?
Exponents
What comes second in order of operations?
Multiply & Divide left to right
What comes third in order of operations?
Add & Subtract left to right
What comes fourth in order of operations?
Similar Figures
what has congruent angles and equal ratios of the sides?
Proportions
what do you use to solve similar shapes and similar picture problems?
Flip the second and multiply
To divide fractions, convert to improper fractions then do what?
Positive
Negative X Negative =
Negative
Negative X Positive =
Positive
Positive X Positive =
Negative
Negative + Negative =
Positive
Positive + Positive =
Line up the decimal
When adding and subtracting decimals you?
multiply without decimal, give answer total number of decimal places in the problem
When multiplying decimals you?
move the decimal right in the divisor/dividend
When dividing decimals you?
left
On a number line numbers get smaller to the?
Cross multiply (butterfly)
To compare fractions you?
common denominators
When multiplying and dividing fractions you do NOT need?
straight across
When multiplying fractions you multiply?
inverse operations
When solving an equation for a variable use?
diameter
What is the distance across a circle called?
radius
What is half of the diameter called?
Circumference
The distance around the outside of a circle?
Perimeter
What is the distance around the outside of an object?
Area
What is the space inside of a 2D shape called?
square the radius
What operation must be done first when finding the area of a circle?
Keep Change Change
Change subtraction to addition by doing what?
180 degrees
The angles inside a triangle add up to?
360 degrees
The angles inside a quadrilateral add up to?
multiply it by itself
squared means?
sum of data items divided by number of items
How do you find the mean?
middle of data items ordered from least to greatest
What is the median?
Mode
What is the number that occurs most often in a data set called?
Range
The difference between the least and greatest data value.
difference, spread, variance
What are words that suggest range?
Most often, favorite, most popular
What are words that suggest mode?
Volume
What is the amount of space inside a 3D figure called?
Triangle
What shape is the BASE of a triangular prism?
Move two places to the right and put it over 100 then simplify
How do you change a decimal to a fraction?
1/4
What is the fraction for 25%?
0.75
What percent is 3/4?
Use proportions, use formulas, make a table, draw a picture, use reasoning, work backwards
What are some problem solving strategies
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