core connections course 2 - 3- 242.1 how can i subtract - answer key

What is the foundations for algebra toolkit?

Welcome to your Core Connections: Foundations for Algebra Toolkit! It is designed to help you as you learn math throughout the school year. Inside, you will find all of the Math Notes from your textbook that have useful information about the topics you will study. You will also be able to write in your Toolkit so that you can keep track of what you have learned in your own words and refer back to those notes as you move forward.

How to understand a set of data?

To understand a set of data, you often need to be able to describe the approximate “center” of that data . One way to do this is to find the mean of the data set, which is also called the arithmetic average .

What is a portion web diagram?

The portions web diagram at right illustrates that fractions, decimals, and percents are different ways to represent a portion of a number. Portions can also be represented in words, such as “four-fifths” or “seven-fourths,” or with diagrams such as those shown below. A complete portions web is shown below right.

What is the toolkit at the end of each chapter?

At the end of each chapter in your textbook, there are lists of all of the Learning Log entries and Math Notes for that chapter. There are also lists of important vocabulary words. Take time as you complete each chapter to look through your Toolkit and make sure it is complete. Updating your Toolkit regularly and using it when you are studying are important student habits that will help you to be successful in this and future courses.

What is the best tool to find the center of a set of data?

The mean is a useful way to find the center when data values are close together or are evenly spaced. Another tool, the median, also locates the approximate “center” of a set of data in a different way.

How to find the area of a rectangle?

The area of a rectangle is found by multiplying the lengths of the base and height. See the examples at right.