Problem preview

MF.RN.2 Challenge MF-008-A13-V03

Add and subtract fractions and mixed numbers with appropriate common denominators.

Choose the right fraction-operation strategy

Problem

Find \(3/8~+~5/12\). Determine whether \(24\) or \(96\) is the better denominator for rewriting both fractions. State the denominator, rewrite the fractions, add, and give the sum in simplest form.

Answer choices

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Preview only

Choose 24; rewrite 3/8 as 9/24 and 5/12 as 10/24, then add to get 19/24.

Choose 96; rewrite 3/8 as 36/96 and 5/12 as 40/96, then add to get 19/24.

Choose 24; rewrite 3/8 as 9/24 and 5/12 as 10/24, then add to get 19/48.

Choose 24; rewrite 3/8 as 6/24 and 5/12 as 10/24, then add to get 16/24 = 2/3.

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Curriculum context

Course: Math Foundations
Standard: MF.RN.2
Category: Rational Numbers
Domain: Fractions
Objective: Add and subtract fractions and mixed numbers with appropriate common denominators.
Problem type: Choose the right fraction-operation strategy