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unlike denominators

  • Common Denominator – Why?

    Common Denominator – Why?

    We explain steps in great detail to students but often omit the underlying concept. The topic of adding or subtracting fractions with unlike denominators is an example of this.       The example above right is a short cut for what is shown above left. These short cuts, which math teachers love to use,…

  • Fractions! Meaning Making for Comparing Fractions

    Fractions is one of the most challenging math topics. Many high school and college students struggle to some degree with fractions.  The Common Core of State Standards (CCSS), despite all the criticism, includes components to address the conceptual understanding of fractions. Below is a photo showing a 4th grade Common Core standard regarding fractions along…