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Main Idea and New Vocabulary
NGSSS
Key Concept: Add and Subtract Like Fractions
Example 1: Add Like Fractions
Example 2: Add Like Fractions
Example 3: Subtract Like Fractions
Example 4: Subtract Like Fractions
Example 5: Subtract Like Fractions
Example 6: Real-World Example
Five-Minute Check
• Add and subtract fractions with like denominators.
• like fractions
MA.7.A.3.2 Add, subtract, multiply, and divide integers, fractions, and terminating decimals, and perform exponential operations with rational bases and whole number exponents including solving problems in everyday contexts.
Add Like Fractions
Find Write in simplest form.
Add the numerators.
Simplify.
Answer: __1112
Add Like Fractions
Find Write in simplest form.
Add the numerators.
Use the rules for adding integers.
Answer: – __56
Subtract Like Fractions
Find Write in simplest form.
Subtract the numerators.
Simplify.
Answer: __23
Subtract Like Fractions
Find Write in simplest form.
Answer: – __910
Subtract the numerators.
Simplify.
Subtract Like Fractions
Find . Write in simplest form.
Answer: – __12
Subtract the numerators.
Simplify.
ART A picture mounted on art board is inch
thick. The frame for the picture is inch thick.
How much thicker than the picture is the frame?
Subtract the numerators.
Answer: The picture is inch thicker than the frame.
Simplify.=
WINDOWS A pane of window glass is inch
thick. A second pane of glass is inch thick.
How much thicker is the second pane of glass?
A. in. C. in.
B. in. D. in.
For their foreign language requirement, of
students take French and of students take
Spanish. The remaining students take sign
language. What fraction of students takes sign
language?
A. C.
B. D.
Eric had of a bottle of shampoo left. He
used of the bottle on his dog. How much
shampoo did Eric have left?
A. of a bottle C. of a bottle
B. of a bottle D. of a bottle
