Fractions 1

Dear all,

We would have completed Word Problems 2 and have started on Fractions Today.

Concepts to remember:

• Denominator refers to the number below in a fraction. (number of equal parts being divided of a whole)
• Numerator refers to the number above in a fraction. (number of parts used)
• Like fractions refer to a set of fractions with the same denominator like 1/2 + 1/2
• When we add fractions, we have to first look at the denominator. If the fractions have the same denominator, then we can proceed to adding them up. If not, we have to change the denominators to a same number first. When we add fractions, we only add the NUMERATOR. We do not add the denominator. Always remember that. 
• 1/3 + 1/3 = 2/3 (We only add 1 to 1 because they are the numerators) The denominator remains the same because the number of equal parts of a whole always remain the same. 
• For example, I cut a pizza into 3 equal parts. Tom ate one slice and I ate one slice. How many slices were eaten. 1 + 1 = 2. The total number of equal parts will always be 3 because the pizza is cut into 3 slices. So, this '3' represents the denominator. Tom ate 1 part so this becomes the numerator. The fraction of the pizza that Tom and I ate will be 1/3 + 1/3 = 2/3
• Unlike fractions refer to fractions in which the denominators are not the same. Therefore, before we can add them up, we need to change the denominator into a same number first through your common multiple concept. 
• In 1/3 + 2/6 (Since the denominators are not the same), we first have to convert the fractions to like fractions first. 1/3 = 2/6. Adding them up now, 1/3 + 2/6 = 2/6 + 2/6 = 4/6
• 4/6 can be simplified into 2/3. 
• You can read this website for more information 
• Click here!

Homework for the weekend:

Maths Workbook Fractions(1) Pages 65 - 68

Sincerely,

Mr Nelson Ong