Practice
1:
What is the correct value of the
expression below?
9 + (12-3) x 4 - 22
- 68
- 88
- 41
- 36
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Explanation: To identify
the correct choice, follow these steps:
First, let's
begin by taking a look at the 6 steps to solving
math problems.
- Step 1: Understand
the problem, what is being asked in this problem?
You are asked to find the correct value or answer
to a given mathematical expression.
- Step 2: Now
you need to analyze the information you are given.
You have a long mathematical sentence for which
you need to find an answer. In order to solve this
one, you will need to know the correct order of
operations.
- Step 3: It
is time to make a plan to solve this one. You will
only need to perform the operations asked for in
the sentence, but you need to know which ones to
do first, second, and so on. Do you remember the
order of operations? See if this rings any bells,
Please Excuse
My Dear
Aunt Sally.
The first letters of each word in the sentence tells
us what the order of operations is, parenthesis,
exponents, multiplication, division, addition, and
subtraction. Remember now?
- Step 4: As
you look over the expression you want to make an
estimation of what the answer might or could be.
Look over the problem and see if you can come up
with an answer that might be close to being correct.
Maybe you see an estimated answer of 50. That is
fine, remember this is only an estimation to help
keep focused on the answer you are after.
- Step
5: Next, you want
to solve the problem using order
of operations.
9 +
(12-3) x 4 - 22
9 + 9 x 4 - 22 (You
did what was in the parenthesis first.)
9 + 9 x 4 - 4 (Next, you take care of the exponent.)
9 + 36 - 4 (Multiplication comes next.)
45 - 4 (Addition is next.)
41 (Your final answer.)
- Step
6: Now that you have
an answer, check that answer
and see if you get it a second
time. Then check to see if it
is one of your 4 choices for
the question.
After looking over the 4 choices, you notice that
choice C has the same answer, 41.
CHOICE C it
is!
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Let's look at a little different selection
and then you can try some on your own!
Practice
2 >>
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