Tuesday, November 10, 2015

Adding and Subtracting positive and negative numbers - Online Help

Online Help Math is Fun Site:
Adding and Subtracting Negative Numbers
Click here to access

Positive and negative numbers on a number line

ATN Problem 1.4 In the Chips

How can you use a chip model to represent addition and subtraction?

In this investigation, we will be using chips to represent positive and negative integers. 

You may have heard the terms, "In the red" (meaning you owe or have a negative amount of money) and "In the black"(meaning have a positive amount of money)

In the image above, there are black positive chips and red negative chips on the board. Some red and black chips have already been put together in "zero pairs" that cancel each other out. Is this image "in the black" or "In the red"? How do you know?

Now try for yourself: 

Wednesday, November 4, 2015

Accentuate the Negative - Unit #2

Unit Goals:

In this unit, the focus is on understanding and developing systematic ways to add, subtract, multiply, and divide positive and negative numbers. Students will develop algorithms for computations and will use the order of operations, the Commutative Property, and the Distributive Property to solve problems.

Important concepts outlined below.