ADDIng COMMON FRACTION WITH the same DENOMINATOR

 

 

 

Tom has eaten 2 unit pieces of a chocolate bar and his brother - 3 such pieces. What fraction of the chocolate has been eaten by them?

 

This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com

Model other situations of eating chocolate by two children.

 

1.  Use the model to depict the following sums of fractions and tell the result:

            

This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com

You could move the green square by means of the yellow dot.

This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com

 

2.   Use the model to depict the following sums of fractions and tell the result:

               

This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com

 

 

 

To ADD COMMON FRACTION WITH the same DENOMINATOR


1. you add the numerators and get the denominator of the sum
2. leave the denominator the same

 

 

 

 

 

 

 

 

3.   Use one of the models to depict the number 1 as a sum of two common fractions with denominators:  а) 4;  b) 10.

How many representations did you find?