## Math Review – Formulas Chapter Practice Set 2, Pt 1 “Order of Operations”.

In practice set two, we evaluate
expressions that have multiple steps. We need to have a set of rules to follow so that everyone will get the same answer to a multi-operation problem. These rules are called the order of operations and these are also presented
in your lesson, in your book. First do work inside the parentheses, if any, then do any powers or roots. Next, to do all multiplications and
divisions and finally do the additions and
subtractions. And note, always read the expression you
are working with from left to right, as you employ these rules. Let’s try a few together from practice
set two. Evaluate each expression using the Order
of Operations and around any decimal answers to the
nearest tenth. Number three, I see two steps here, I have a subtraction and
I have a multiplication. According to my Order of Operations, I’m going to perform the multiplication
first and rewrite my expression, 10 minus the result of two times four, which is 8. Finally I will perform the
subtraction 10 -8 is 2. Let’s try a couple more together. Number five, I see four times three plus five squared. According to my Order of Operations, this
power needs to be performed first. I rewrite my
expression, four times three with the result of this fives squared, which is 25. Next I perform multiplications and divisions. I do have a multiplication here, four times three is 12, I write that
result, and bring the rest of my expression
along. And last I can perform the addition, 12 plus 25 is 37. And in number 8, I’m involving the square
root. That also needs to come before the addition is performed. So I have five
plus the result of the square root of 36, which is 6. And then I perform my addition. Five plus six is 11.