Math Worksheet - Grade 7 Page 24
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34th
7
Grade Honors
Unit: Knowledge of Number Relationships & Computation
Objective: Add, subtract, and multiply positive fractions and mixed numbers. - B
Examples:
• To subtract unlike fractions (fractions with different denominators), rename the fractions so there is a
common denominator.
7
1
7
7
x
1
7
1
1
x
4
4
7
4
3
Subtract:
−
=
=
=
=
=
−
=
8
2
8
8
x
1
8
2
2
x
4
8
8
8
8
3
1
3
3
x
3
9
1
1
x
4
4
Subtract:
5
2
5
5
5
2
2
2
−
=
=
=
=
=
4
3
4
4
x
3
12
3
3
x
4
12
9
4
5
5
2
3
−
=
12
12
12
**Note: If you have to borrow from the whole number change to improper fractions, find a
common denominator, subtract, and then change back to proper fractions.
9
1
2
1
1.) Subtract:
2.) Subtract:
−
−
10
10
3
6
7
3
3
11
3.) Subtract:
4.) Subtract:
9
4
5 −
4
−
10
5
8
12
*Hint: Change to improper fractions first!
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5.) Melanie had
4 pounds of chopped walnuts. She
6.) Lois has
3 pounds of butter. She uses
pound in
4
3
3
a recipe. How much does she have left? *Hint: Change to
1
used
1 pounds in a recipe. How many pounds of
improper fractions first.
4
chopped walnuts did she have left?
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