# COMPARE FRACTIONS INSTRUCTIONS

Compare with Number Line Models uses number lines to demonstrate comparing fractions.

You can un put the two fractions to compare. Each fraction must be less than one. Press the <OK> button and the number lines for the fractions will appear.

Many fractions can be compared by visualizing them, or you may compare by writing each fraction over a common denominator. Fractions written with the same denominator are known as like fractions.

If fractions are unlike, or have different denominators, you may make them like by writing over a common denominator. Here, the idea of the least common denominator or LCD can be used. For the fractions 3/4 and 2/3, The LCD is the smallest number that both denominators 4 and 3 will divide into evenly.

The LCD for the fractions 3/4 and 2/3 is 12 because both denominators 4 and 3 divide evenly into 12. Writing each fraction with the common denominator 12 will give you 9/12 and 8/12. You can now compare the numerators.

Uncheck the <EXPLAIN> check box to turn off the answer and the explanation. You can ask your students to complete the number sentence.

Uncheck the <SHOW INPUT> check box to make the input dialog boxes work like a password input boxes, hiding the numbers you input. With <EXPLAIN> and <SHOW INPUT> unchecked you can ask your students to write a number sentence that explains the picture.

With <EXPLAIN> and <SHOW COLOR> unchecked you can ask your students to complete the picture by shading the number lines.

Suggestions:

Keep one of the fractions the same size, but change the size of the numerator and denominator of the other fractions and compare.

Demonstrate equivalent fractions with 2/3 and 4/6 or 1/5 and 2/10.

Demonstrate lowest terms with 4/12 and 1/3. Here, the numerator of 1/3 will have four check marks showing the common factor 4. It also shows that you are not "reducing" the fraction, an unfortunate expression used by many textbooks - and web sites.

With <EXPLAIN> and <SHOW INPUT> unchecked you have the opportunity to ask the student to write a math statement from the fraction model.

You may copy the screen by pressing <Print Screen> on the keyboard. This copies the screen into Windows Clipboard™. The screen can then be pasted into Windows Paint™ or your favorite imaging program. Windows Paint™ will allow you to crop, print, or save the image.

Windows 7 users can use the Snipping Tool™ to capture any part of the screen you wish. These images can be edited and saved in PNG, GIF(recommended) or JPEG formats.