Understand Fraction Addition and Subtraction
Elementary School Math · Flashcards · Recall
ELEMENTARY SCHOOL MATH · FLASHCARDS
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QUESTION
What does it mean to add fractions with the same denominator, such as
a
b
+
c
b
\frac{a}{b}+\frac{c}{b}
b
a
+
b
c
?
QUESTION
What is the rule for subtracting fractions with the same denominator,
a
b
−
c
b
\frac{a}{b}-\frac{c}{b}
b
a
−
b
c
?
QUESTION
What must be true about the whole when you add or subtract fractions in Grade
4
4
4
?
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ANSWER
The fractions must refer to the same whole. Can't combine fractions from different-sized wholes (e.g., half a pizza vs. half a cookie).
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