Yellow
Green
Blue
Red
Magenta
Remove
LESSON 1 Fraction Strips
Lee Yah demonstrated folding fourths for her class.
“First, I folded my strip into two equal pieces. I folded my strip by matching the edges and then making a crease in the middle.”
“Next, I kept the strip folded and then I folded it in half again.
“When I unfold the strip, it is
divided into 4 equal pieces.
“Since the 4 parts are all the same size, each piece is 
of the strip.”
Lee Yah showed three of the pieces to show 
of the strip.
In a fraction, the bottom number is the denominator. This number tells us how many equal pieces the whole is divided into. The top number, the numerator, tells us how many of the pieces we are concerned with.
- In the fraction , what information does the denominator give us?
- What information does the numerator give us in the fraction ?
- What happens to the size of the equal parts as the denominator gets bigger? Why?