Session 10
Activity 1: Adding fractions
Adding fractions corresponds to putting pieces together. Represent the the following operations using the applet. What fraction is represented in the end? Can you simplify the result? 1) 2) 3) 4)
Activity 2:
To subtract two fractions, we take away the second fraction from the first fraction How can we represent this using the applet? Try representing the following subtractions: 1) 2) 3)
Adding and subtracting
Fractions with the same denominator use the same pieces!
When we add or subtract them, we only add or subtract the number of pieces.
To add or subtract fractions with the same denominator, we keep the denominator, and add or subtract the numerators.
Example: Try representing the following operations, to check that they are correct!
What happens in the real line?
We can also add fractions on the real line! Use the following applet to represent the following additions:
a)
b)
c)
Activity 3: Additions on the line
We can also add fractions on the real line! Use the following applet to represent the following additions: a) b) c)
Activity 4: Subtractions on the line:
Represent the following subtractions with the next applet: 1) 2) 3)