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LESSON 3 Add, Subtract, and Multiply
with Fraction Strips
Mrs. Dewey asked her class to use their fraction strips to add 
and 
. Keenya explained her solution to the class:
and . Keenya explained her solution to the class:
“First, I folded my strip that shows fourths so that 1 piece or of the strip was showing. Then, I added of the strip by unfolding 2 more pieces. I ended up with 
of my strip showing. So, + = .”
of the strip was showing. Then, I added of the strip by unfolding 2 more pieces. I ended up with of my strip showing. So, + = .”
Next, Mrs. Dewey asked the class to use their fraction strips to subtract 
from 
.
from .
Jacob explained his solution to the class:
“I started with my strip that is divided into eighths. I folded it so that of the strip was showing. Then, I folded of the strip or 3 more pieces of the strip back since I was subtracting. This left me with 
of the strip showing,
so – = .”
of the strip was showing. Then, I folded of the strip or 3 more pieces of the strip back since I was subtracting. This left me with of the strip showing,
so – = .”
