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Praxis 2 5018 - Elementary Math Content
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Gravity
Key Concepts:
Terms in this set (44)
Natural Numbers
Numbers 1 and up (1, 2, 3, 4)
Whole Numbers
Numbers 0 and up (0, 1, 2, 3, 4)
Intergers
0 and all whole numbers positive and negative (-4, -3, -2, -1, 0, 1, 2, 3, 4)
Rational Numbers
Fractions
Irrational Numbers
Decimals that can not be written as a fraction. Decimal that repeat or doesn't end (Pi=3.1415......)
Commutative Property of Multiplication
Can multiply in any order ie: 5x4=20 vs 4x5=20
Associative Property of Multiplication
Multiplication in different groups ie: (3x4)x2=24 vs 3x(4x2)=24
Distributive Property of Multiplication
Facts that can be broken into sum of 2 different facts ie: 7x4=(5x4)+(2x4)
Identity Property of Multiplication
Multiplying any factor times 1 (8x1=8)
Zero Property of Multiplication
Multiplying any factor times 0 (8x0=0)
Range
The difference in the largest number and the smallest number in a set
Median
The middle number in a set. If the set has an even number of numbers, then the it is the average of the two middle numbers in the set.
Average the middle 2 numbers of the set
If the set has an even number of numbers, then how do you find the Median?
Mode
The number that occurs most frequently in a set of numbers.
Mean
The average of a set of numbers. (All of the numbers added together and divided by the total amount of numbers in the set.)
Powers of 10
10^-2 = .01
10^-1 = .1
10^0 = 1
10^1 = 10
10^2 = 100
1000
10^3
0.001
10^-3
10mm
1cm=?mm
1000mL
1L=?mL
Perimeter
c=sq root of a^2+b^2 (for a polygon)
4
(4,-3) Would be in what Quadrant
2, 4, -8
2x^3+4y^2-8 What are the coefficients?
x, y
2x^3+4y^2-8 What are the variables?
3, 2, 0
2x^3+4y^2-8 What are the degrees?
65
5y=8y Solve if y=5
Convex
Are these shapes convex or concave?
Concave
Is this shape convex or concave?
Dependent variable
Changes based on independent variable
Independent variable
The changing variable
0.2003
Which of the following number is the least
0.203
0.22
0.2003
0.2043
20/r
In the formula d=r*t, if d equals 20 and t remains constant what is equivalent to r?
Distrubitive
8x5=(5x5)+(3x5) is what property of multiplication
Identity
8x1 is what property of multiplication
Zero
8x0 is what property of multiplication
Commutative
5x4=20 4x5=20 is what property of multiplication
Associative
(3x4)x2=24 3x(4x2)=24 is what property of multiplication
Slope
y=mx+b is a formula for?
Slope
y=mx+b m=?
y-Intercept
y=mx+b b=?
Perimeter
What do you find when adding the outside edges of a shape?
Area
What do you find when multiplying length x Width?
Additive Identity Property
When you add 0 to any number, the number keeps it's identity. (8+0=8, 0+8=8)
Additive Inverse Property
Adding a number to another number to equal 0 (-5+5=0)
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