**
Addition & Subtraction of Decimal Numbers**

** **

**Objectives:**

· To develop an understanding of what addition is and how to add decimal numbers;

· To develop an understanding of what subtraction is and how to subtract decimal numbers;

· To practice decimal addition problems;

· To practice decimal subtraction problems;

· To become skillful in doing addition and subtraction decimal problems as needed for the GED or other educational goals.

**Outcomes:**

· To correctly complete a decimal addition worksheet

· To correctly complete a decimal subtraction worksheet

**Warm-Up:**

__
Click here__
http://www.mathbuilder.com/cgi-bin/m.cgi?FT=2&F=SIX26 to create a
worksheet on **addition and subtraction** of decimal problems. If you complete
less than 34 correctly on the worksheet, go to **New Instruction**.

**New Instruction:**

To develop an
understanding of **addition and subtraction** of decimal numbers, __
click here__
http://www.math.com/school/subject1/lessons/S1U1L4GL.html. Do Step 1
through Step 4.

**Feedback and Review:**

1. To practice your

additiondecimal problems,click herehttp://www.aplusmath.com/Worksheets/OnlineDecimalAddition.html.Select: 3 by 3, 20 problems, and Horizontal. Complete the worksheet with a score of 90% correct.

2. To practice your

subtractiondecimal problems,click herehttp://www.aplusmath.com/Worksheets/OnlineDecimalSubtraction.html. Select: 3 by 3, 20 problems, and Horizontal. Complete the worksheet with a score of 90% correct.

**Transfer of Knowledge or
Skills:**

1. __
Click here__
http://www.mathbuilder.com/cgi-bin/m.cgi?FT=2&F=SIX26 to create a **
worksheet on addition and subtraction** of decimal problems. If you complete
less than 34 correctly on the worksheet, go to the following:

·
**New Instruction**

o
__
Activity__
http://www.math.com/school/subject1/lessons/S1U1L4GL.html **or **

·
**Feedback and Review**:

o
__
Activity 1__
http://www.aplusmath.com/Worksheets/OnlineDecimalAddition.html **or **

o
__
Activity 2__
http://www.aplusmath.com/Worksheets/OnlineDecimalSubtraction.html

2. When you have
successfully completed this activity, go back to the __
math home page__.