MTTC 103 Elementary Practice Exam 2025 – All-in-One Guide for Comprehensive Exam Success

To add fractions with unlike denominators, finding the least common multiple (LCM) is crucial. The LCM allows students to determine a common denominator for the fractions involved, which is essential for performing the addition correctly. Once the LCM is identified, each fraction can be converted to an equivalent fraction with this common denominator, making it possible to add the numerators together.

This skill connects directly to the foundational understanding of fractions, particularly in operations where denominators differ. The ability to find the LCM ensures that students can effectively handle the addition of fractions, leading to accurate results.

The other options do not relate directly to the process of adding fractions. Simplifying exponents and multiplying decimals involve different mathematical concepts that do not aid in the addition of fractions. Similarly, solving multi-step equations focuses on entirely different aspects of algebra, which would not provide the necessary support for Amanda's specific need in adding fractions with unlike denominators.