Chapter 15, Math, fractions

equivalent fractions

are fractions that are equal but have different names. To find this type of fraction, multiply by one who. You can multiply both the numerator and denominator by the same number. ex. 1/2 x 2/2 = 2/4

Improper fraction

a fraction whose numerator is larger than the denominator. e. 11/4 (eleven fourths)

Mixed number

a whole number and fraction together. example 2 1/4 (two and one half)

To change from a mixed number to an improper fraction

Multiple the denominator by the whole number. add the numerator this total is your new numerator. Keep the same denominator. ex. 2 1/3 = 7/3

denominator

count the total number of pieces. ex. 3/4 the four is called this and 1/2 the two is called this

To change from an improper fraction to a mixed number

divide the numerator by the denominator that answer is your whole number. The remainder is your new numerator. Keep the same denominator. ex. 13/4 = 3 1/4

Comparing fractions

if both numerators are the same. Look at the denominators. The smaller denominator is the bigger fraction. If both denominators are the same, look at the numerators. The bigger numerator is the bigger fraction. You can also draw a picture to compare fractions (rectangle divided into sections).

Simplest form

to decide whether or not a fraction is in this form, check to see if the numerator and denominator are divisible by the same number. If they are, then the fraction is not in the simplest form. Divide the numerator and denominator by the same number. example: 5/15 ÷ 5/5 = 1/3

numerator

to show what part is shaded, count the number of pieces that are shaded. example 3/4 three is called this and 1/2 one is called this