Understanding Fractions

Understanding Fractions - Understanding Fractions I...

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Understanding Fractions I. Definitions In module A, all the numbers that we encountered were whole numbers. Although the whole numbers are important, they only tell part of the story. Module B is the study of fractions which are defined as parts of the whole. Example Consider the picture below which might represent what is left of a pizza. We see that the pizza was originally cut into eight slices and there are three slices left. We say that there is 3 8 of the pizza remaining. The number 3 is called the numerator of the fraction and the number 8 is called the denominator of the fraction. Example Write the fraction of red circles in the diagram below. Solution We see that there are 9 total circles, 5 of which are red. The total number of circles is the denominator and the number of reds is the numerator: 5 9 Exercise A. Use a fraction to represent the shaded part of the whole. Hold the mouse over the yellow rectangle for the solution: B. Draw a sketch to illustrate 4/5 .

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