CRM Unit 1a

PEMDAS

100

P

Parentheses.

200

E

Exponents

300

MD

Multiplication and Division, do first reading left to right

400

AS

Addition and subtraction, do first reading left to right

500

What is PEMDAS an acronym for

the order of operations

Using PEMDAS

100

4(2x -7) +4 = 40

x = 8

200

-5 * 3 +8 +(2-(-4)) / (-2)

-10

300

8 - 3 + (-4)^2 / 8 - 7

0

400

-48 / -6 + 5 - (-3) *5 

28

500

-2(-3-7) + 5 *4 / -2

10

Proportions

100

What kind of numbers are proportions?

fractions or ratios

200

what is the name of the method used to solve proportions?

the butterfly method or cross multiplication.

300

14/3 = x /21

x = 98

400

If a car travels 150 miles in 3 hours, how many miles can it travel in 5 hours?

250 miles

500

A grocery store sells a bag of 7 oranges for $3.01. How much would it cost for 9 oranges?

$3.87

Exponents Rules

100

Is the product rule for multiplying or raising something to another exponent?

multiplying

200

What happens when you raise anything to the 0 power?

it equals 1.

300

When using the quotient rule what do you do to the exponents?

subtract.

400

Negative exponents can be turned positive by...

moving them to the opposite side of the fraction (flipping the fraction)

500

When raising a power to a power what do you do with the exponents?

multiply

Simplifying Exponents

100

5^4 * 5^-3

5

200

(x^6)^12

x^72

300

(5x^2y^3)(2x^6y)

10x^8y^4

400

(7x^3y^2) / (21xy^4)

x^2 / (3y^2)

500

(9x^5y^2)^3

729x^15y^6