11 videos in "Subtraction"

Subtracting Negative Numbers

Subtracting Numbers on a Number Line

Subtraction on a Number Line

Addition and Subtraction Problems

Subtracting Integers

Adding and Subtracting Basic Numbers

Adding and Subtracting Numbers

Subtracting Negative Number from Positive

Subtracting a Negative from a Negative

Subtracting Positive Number from Negative

Subtracting Positive Real Numbers
Subtracting Integers
Subtracting Integers
10098 views, 3 ratings  00:10:47
Part of video series Operations with Integers
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com
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Shows how to subtract postive and negative numbers; uses counters. Explains adding the opposite and two stroke method.
 Minus Mission  Game from Math Game Time: Minus Mission is a free math game providing practice in subtraction in a creeping slime theme. Large green slime at the top of the screen drips blobs with subtraction problems toward a robot at the bottom. Kids must fire at the slime with the correct answer.
 How do you subtract positive and negative numbers?
 What does it mean to subtract positive and negative numbers?
 What are the formal rules for subtracting positive and negative integers?
 What does it mean to take the opposite of a number?
 How do you rewrite a subtraction problem as an addition problem?
 How do you rewrite 2  5 as 2 + 5?
 Why can you rewrite 2  (5) as 2 + 5?
 How do you rewrite 2  5 as an addition problem?
 How can you change subtraction into addition by making two pencil marks?
 What is the Two Pencil Stroke Method and why does it work?
 How can you subtract 27  8 by adding the opposite?
 How do you subtract 14  19?
 How do you know if 8  (11) will be positive or negative?
 What is an easy way to change subtraction to addition, and why does it work?
 How could you draw a picture of 2  3 using  and + signs?
 What does it mean to take 6 away from 2?
This lesson shows how to rewrite any integer subtraction problem as an addition problem so the same rules and techniques shown in the adding integers lesson can be used. Many example problems are shown to further solidify this concept. The theory behind why subtracting is the same as adding the opposite is explained as well.
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