Download Add and Subtract Fractions Like Denom

Adding and Subtracting Fractions with
Like Denominators
Name
Vocabulary
The following
properties of addition
are true for all real
numbers.
In this activity, you will add and subtract
fractions using a number line.
1. If the sum of two fractions with
7
, what could be the
4
fractions that were added? Draw the
fractions on the number line to show the
addition.
denominators of 4 is
Commutative
Property:
0
1
2
3
a + b = ____________
_________________________________
Associative Property:
7
2
 . Explain your answer using
10 10
unit fractions.
2. Find
(a + b)+ c = ________
_________________________________
Inverse Property:
5
of a mile. How much farther
12
would he have to run to complete two
miles?
3. Tomas ran
a + (– a) = _________
Identity Property:
0
a + 0 = ____________
1
2
3
_________________________________
4.
If six equivalent unit fractions are added
together and the sum is one, what are the
addends? Explain in terms of unit fractions
why your answer makes sense.
_________________________________
_________________________________
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