Fractions Problems Worksheet

Name_______________________________________________Math 111
Fraction Action #1 (6.2)
1. Analyze the error patterns in the following students’ work. Then, describe how you might help them to correct
their mistakes.
A. Sally’s work
4 2 6
+ = :
5 3 8
2 3 5
+ = :
5 4 9
7 1 8
+ =
8 3 11
B. Steve’s work
3
1
2
8 −6 = 2 :
8
4
4
3
2
1
5 −2 =3 :
8
3
5
2 1
1
2 −1 = 1
7 3
4
2. For each of the problems below, decide what common denominator would be good to use.
A.
2 7
+
:
5 15
1 3
+ :
12 4
1 1
− :
2 14
9 1
−
10 5
What do all these examples have in common?
B.
1 2
+ :
4 5
2 1
+ :
7 6
5 1
−
9 10
What do all these examples have in common?
3. When we add or subtraction fractions, MUST we use the least common denominator? Why or why not? Are
there any advantages or disadvantages to using the least common denominator when adding or subtracting
fractions?
1
cups of sugar for her world-famous sugar cookie recipe. She has the following
3
1
1
1
cup : cup : and
cup .
measuring cups in her cupboard:
4
3
2
4. Bonnie Baker needs 1
1
3
How might she use these 3 measuring cups to measure the needed 1 cups of sugar accurately?