Find the LCD to add and subtract fractions

When we add or subtract fractions that have different denominators, the least common denominator is not always obvious

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QUESTION OF
Views #: 564
Questions #: 4
Time: 5 minutes
Pass Score: 80.0%
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The Least Common Multiple (LCM)

Finding the least common denominator

1 pts
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Choose the right way to find the LCM of the denominators

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Correct Answer

Explanation

Add the following fractions and simplify if possible

1 pts

$\frac{7}{15} + \frac{3}{10}$

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Correct Answer

Explanation

Subtract and simplify the following two fractions

1 pts

$\frac{13}{28} - \frac{1}{21}$

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Correct Answer

Explanation

Keywords
Year 5