Order of Operations
What does P.E.M.D.A.S. stand for? What is it used for?
P:
E:
M.D.:
A.S:
P: Parenthesis ( )
E: Exponents 23
M.D.: Multiply and Divide x, /A.S.: Addition and Subtraction +, -
It is used as rules to solve Algebra Problems
-9 + 2
-7
Convert this fraction to a decimal: 3/5
0.6
What is the answer to the following equation and why?
5,000,000,000 x 0 =
0 b/c any number times 0 is zero.
Selina has $165 in her checking account. She writes a check for $207. What is the new balance (value) in her checking account?
$-42. Selina is in debt..... don't be like Selina, don't get in debt.
Where do you start with this problem:
3 x {[2(9 -2) + 2] - 4[6/3 + 5]}
Say what is the first operation you would do and why?
3 x {[2(9 -2) + 2] - 4[6/3 + 5]}
Start with (9 - 2) because it is the inner most parenthesis.
-7 - 9 + 3
-13
Simplify: 2/3 + 3/4
17/12 or 1 5/12
6 / 0
Why or why not?
It is undefined and cannot be simplified b/c you cannot divide things into zero groups.
What is the LCM of 24 and 50?
24(3 x 2 x 2 x 2)
50( x 2 x 5 x 5)
LCM =3 x 2 x 2 x 2 x 5 x 5 = 600
(2 × 23) / (23 )
2
-9 - (-9) + 9 - 9
0
Convert this percent into a decimal
875%
8.75
What property of numbers is being used here:
2x = 4 --> (2/2)x = (4/2) --> x = 2
Multiplicative inverse or inverse operation.
To remove the 2 from x you must divide by 2 on both sides of the equation, to find the value of x.
Kirsten has 3/4 meters of ribbon that she wants to cut into 6 equal parts to make hair ribbons for her daughter's 6 dolls. How long will each doll's hair ribbon be?
1/8 meters each.
8/(5-1) x (3 + 6) x 3
54
l4 - 6l - l9 - 15l
-4
Convert this decimal into a fraction and simplify
0.875
7/8
What property of real numbers is being shown here:
2(3x - 4y) --> 2(3x) - 2(4y) = 6x - 8y
Distributive property
Jake has two jobs. He gets paid $7.95 per hour at the college cafeteria and $20.25 at the art gallery. Last week he worked 12 hours at the cafeteria and 5 hours at the art gallery.
$196.65
62 + (-14)/2 - (-8)
37
((16 - l3(8 - 5)l) / 2)
4
(((25/12) + (1/4))/ ((5/6 - 7/8)))
-54
2 part question:
1. This property states that the order of multiplication and addition doesn't affect the result.
2. This property states that grouping of multiplication and addition doesn't affect the result.
1. Commutative Property
2. Associative Property
Greg has nickels and pennies in his pocket. The number of pennies is seven less than twice the number of nickels. Let n represent the number of nickels. Write an expression for the number of pennies.
p = 2n - 7