Automotive Technology - Number And Quantity Dynamometer Page 2

ADVERTISEMENT

Automotive Technology (47.0604) T-Chart
Instructor's Script - Comparing and Contrasting
Order of Operations is an essential skill for any student in a technical area that uses formulas. In addition to substituting values into
the formula, the student must also apply the order of operations to reach a solution
Common Mistakes Made By Students
Improper use of calculators: Students are usually very quick to use calculators when faced with formulas but if they are not
proficient in using the order of operations, they will not insert parentheses where needed or press “=” at the wrong points and arrive
at incorrect answers.
Familiarity with the calculator: In some calculators, you must enter the radical sign first and in some calculators the radical sign
is entered after the number is entered. Some calculators automatically do some of the correct order of operations. You need to
know your calculator. Calculators are great tools, but you need to know the correct way to use them.
When entering the square of a negative number in a calculator it is important to put it in parentheses. You need to enter (-
2
2
2)
not -2
. For the latter the calculator thinks you are saying the negative of 2 squared or -4, and not (-2) (-2) = 4.
When dealing with fractions students often will forget to put the numerator of the fraction and the denominator of the
fraction in parentheses. If you enter (3 + 6)/9 into the scientific calculator, it recognizes that 3 + 6 is in the numerator and does
this operation first, giving the answer 9/9 or 1. If you put 3 + 6/9 (without the parentheses) into a scientific calculator, it will give
you an answer of 3.66…
CTE Instructor’s Extended Discussion
When testing a car's power output during performance tuning, mechanics use a device called a dynamometer, or dyno. An engine
dyno is one of the two main types of dynamometers, measuring power by hooking the engine up to one of several devices designed
to measure the engine's ability to do work. This is the application of this mathematical concept. It is always good to understand the
math involved so if the test machine is defective, you have a basic understanding of the correct answer.
Originated June 2009
CC.2.1.HS.F.1
Reviewed June 2015
2

ADVERTISEMENT

00 votes

Related Articles

Related forms

Related Categories

Parent category: Education
Go
Page of 4