Pgs

What’s the answer?  x 4 – 3

Order of Operations  Hopefully you remember this:  BEDMAS  Brackets, Exponents, Divide, Multiply, Add, Subtract

B – Do the operations in brackets first E – Next, evaluate any exponents D M A S Then, divide and multiply in order from left to right Then, add and subtract in order from left to right

Brackets  Just be aware brackets can look like any of these.

Exponents  This will be our next unit, so we will just review the basics  This is what you should know already: 3 2 Exponent Base Power 3 is the base 2 is the exponent 3 2 is the power 3 2 is a power of 3

Exponents Remember that 3 2 means that we have 3 units by 3 units AKA 3 x 3 = x 3 = 3 2 = 9 9 is a square number

Exponents 5252 = 5 x 5=

Watch your negatives  With rationals we have to be careful with negative numbers.  With brackets (-4) 2 = (-4)(-4)= +16

If there are no brackets…

With decimals (0.5) 2 = (0.5) x (0.5)= 0.25

B – Do the operations in brackets first E – Next, evaluate any exponents D M A S Then, divide and multiply in order from left to right Then, add and subtract in order from left to right

Example 1 Brackets first. Then evaluate the power Then multiply Add

Subtract in the brackets first Use a common denominator of 8 To divide, multiply by the reciprocal of -5/16 Example 2

Example 3 The formula converts temperatures in degrees Fahrenheit, F, to degrees Celsius, C. What is 28.4°F in degrees Celsius? Substitute F = 28.4 in the formula SOLUTION

Homework  Page  3, 4, 7, 11, 12

Now with Rationals

A harder example