# Category: Math

## How to Convert Fractions to Decimals

Hi I’m Bob Welds and this is how to convert a fraction to a decimal using a calculator. A lot of people don’t like fractions because they are not sure how to use them...

## How to Read a Metric Vernier Caliper

Reading a vernier caliper is tricky.  In this video Bob and Sparky go over how to read a metric vernier.  If you need more practice reading metric vernier calipers, see our practice sheets.

## Metric Vernier Caliper Practice Sheets

Reading a vernier micrometer takes practice.  We put together some practice pages with and without answers.  There are two versions, a shaded one that is more realistic, and a non-shaded one that is easier...

## Basic Trig – Sine and Inverse Sine

If you have never had a trig class, you can do some pretty useful things with just a few trig functions.  Bob Welds discusses the sine of an angle and how to use it. ...

## How to Read a Ruler or Measuring Tape

Reading a measuring tape or a ruler is something a lot of people learn in school and then don’t use for years.  When it’s time to dust off your ruler or tape measure, you...

## How to Read an Architect’s Scale

Architect’s scales are used on scale drawings.   In the video, Bob and Sparky break down the basics of using an architect’s scale.   Here is the video transcript:   The type of architect’s scale...

## What is Pi?

Engineers use pi all the time for their calculations, but what the heck is pi anyway?  Bob and Sparky break it down for us in this video. Here is the video transcript: Let’s talk...

## How to Read a Metric Micrometer

A micrometer is used to take very precise measurements. There are different kinds (inside, outside, depth, inch), just look it up on Wikipedia. But here I have a metric one. This one measures to...