Fractions, Percentages, and Proportionality · Number Sense

Adding and Subtracting Fractions

Developing methods for calculating with fractions that have different denominators.

Key Questions

  1. 1Why must we have a common denominator before we can add or subtract fractions?
  2. 2How does finding the least common multiple simplify the process of adding fractions?
  3. 3What happens to the total value when we add a proper fraction to a mixed number?

NCCA Curriculum Specifications

NCCA: Primary - NumberNCCA: Primary - Fractions
Class/Year: 5th Year
Subject: Mathematical Mastery: Exploring Patterns and Logic
Unit: Fractions, Percentages, and Proportionality
Period: Number Sense

Suggested Methodologies

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