- 42 lessons
- 0 quizzes
- 10 week duration
An introduction to numerical computation. Emphasis is placed on scientific and engineering notation, the rule of significant figures, and converting between SI and Imperial units.
Fractions, Percentage, Ratios and Proportion
Emphasis here is placed on understanding fractions, percent, and using ratios to compare quantities and set up proportions to solve problems.
Introduction to Algebra
Functions and Graphs
This unit focuses on analyzing and understand the characteristics of various shapes, both 2D and 3D.
- Identify, measure, and calculate different types of straight lines and angles
- Calculate the interior angles of polygons
- Solve problems involving a variety of different types of triangles
- Calculate the area of a variety of different types of quadrilaterals
- Solve problems involving circles
- Calculate the areas and volumes of different solids
Rules of Significant Figures
Now that we’ve cover scientific, engineering, and decimal notation, it’s time to learn the rules of significant figures (abbreviated SF, and also referred to as significant digits). Without knowing these rules, you will NOT be able to add, subtract, multiply, or divide any number correctly moving forward. The first video will walk you through how to count for the correct number of significant digits in any type of number:
Next, you’ll need to know the rules for rounding numbers to the correct number of significant figures. Rounding and significant figures go hand-in-hand in almost every calculation. When you’re asked to calculate something to the correct number of SF’s, it implies that you round as well. Also, don’t assume you know the rules, because what you learned in elementary school no longer applies here the same way, especially when your last significant figure is a 5.
- For a more elaborate video on how to deal with significant figures when the last number is 5, watch this tutorial.
Now that you now the rules of counting and rounding SF’s, let’s trying adding, subtracting, multiplying, or dividing numbers.
Part 2 of this series shows more of the same, except we extend our understanding to numbers of greater complexity, such as the operations applied to scientific notation numbers.
A few things to keep in mind when operating with numbers in scientific notation are summarized underneath. Of course, most scientific calculators – namely the one recommended for this course – enables you to find the answer without the recommendations below.
Tips for Adding and Subtracting Scientific Numbers
If two or more numbers to be added or subtracted have the same power of 10, we combine the numbers and keep the same power of 10. For example:
If the powers of 10 are different, they must be made equal before the numbers can be combined.
- A shift of the decimal point of one place to the left will increase the exponent by 1.
- A shift of the decimal point of one place to the right will decrease the exponent by 1.