**
Addition & Subtraction of Fractions**

** **

**Objectives:**

· To develop an understanding of addition of fractions

· To develop an understanding of subtraction of fractions

· To practice fraction addition problems

· To practice fraction subtraction problems

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

**Outcomes:**

· To correctly complete a fraction addition worksheet

· To correctly complete a fraction subtraction worksheet

**Warm-Up:**

1. To create a

worksheet on addition and subtractionof fraction problems,click herehttp://www.mathbuilder.com/cgi-bin/m.cgi?FT=401&F=FIVE68.

2. If you complete less than 20 correctly on the worksheet, go to the

New Instructionsection of this page.

**New Instruction:**

1. To develop an

understanding of addition and subtractionof fractions,click herehttp://www.math.com/school/subject1/lessons/S1U4L3GL.html. Do Step 1 through Step 4.

2. To continue developing your

understanding of addition and subtractionof fractions,click herehttp://www.kidsolr.com/math/fractions.html and complete Add/Subtract Fractions & Mixed Numbers. Pay particular attention to Subtracting Mixed Numbers on pages 10 and 11 for borrowing instruction.

**Feedback and Review:**

1. To

practice your additionfraction problems,click herehttp://www.visualfractions.com/. Scroll down to Add Fractions and complete all six sections. Read the instructions at the bottom of the page and complete correctly 20 problems at the top of the page.·

Add Fractions With LinesorAdd Fractions With Circleswill give you instruction and practice in addition of fractions. Each addend in this program has like denominators.·

Add Unlike Fractions With LinesorAdd Unlike Fractions With Circleswill give instruction and practice in addition of fractions with unlike denominators. Common denominators may be required.·

Add Fractions-Strict With LinesorAdd Fractions-Strict With Circleswill give instruction and practice in addition of fractions with unlike denominators. The sum must be entered as a mixed number and in lowest terms.2. To

practice your subtractionfraction problems,click herehttp://www.kidsolr.com/math/fractions.html. Scroll down to Subtract Fractions and complete all four sections. Read the instructions at the bottom of the page and complete correctly 20 problems at the top of the page.·

Subtract Fractions With LinesorSubtract Fractions With Circleswill give instruction and practice in subtracting fractions with unlike denominators. The concept of "borrowing" is introduced.·

Subtract Fractions-Strict With LinesorSubtract Fractions-Strict With Circleswill give instruction and practice in subtracting fractions with unlike denominators. The difference must be entered as a mixed number and in lowest terms.

**Transfer of Knowledge or
Skills:**

1. To create a worksheet on addition and subtraction of fractions,

click herehttp://www.mathbuilder.com/cgi-bin/m.cgi?FT=401&F=FIVE68. If you complete less than 20 correctly on the worksheet, go to:·

New Instruction:o

Activity 1http://www.math.com/school/subject1/lessons/S1U4L3GL.htmloro

Activity 2http://www.kidsolr.com/math/fractions.htmlor·

Feedback and Review:o

Activity 1http://www.visualfractions.com/oro

Activity 2http://www.visualfractions.com/

2. When you have successfully completed this activity, go back to the

math home page.