# Units of measurement in modeling

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Modeling is an amazing world, full of challenges. In this topic, we will start to think about some general modeling concerns, before we dive into modeling situations with different kinds of functions and equations throughout the Algebra curriculum.

## Intro to dimensional analysis

Learn how to work with units that are arithmetic combinations of more simple units. For example, velocity units are quotients of distance units over time units, which corresponds to the formula v=d/t.

## Dimensional analysis for converting

Practice solving word problems that involve the conversion between different units for the same quantity. For example, a rate problem where some rates are in km/h and some are in m/s.

## Dimensional analysis for proportional reasoning

In middle school we learn how to solve proportion problems using proportional reasoning. In this tutorial you will learn how to solve those problems using dimensional analysis.

## Word problems with multiple units

Practice solving word problems that involve a variety of units.

## Determining precision in descriptive modeling

This tutorial discusses the delicate relationship between descriptive mathematics (which can be very precise) and the real world it describes (which usually isn't precise at all).