In this Grade 5 Pengi Math lesson, students learn how to add and subtract fractions with unlike denominators by rewriting them with a common denominator before solving. The lesson also covers simplifying results and converting improper fractions when necessary. Students practice identifying and correcting common errors in fraction addition as part of Chapter 5 on adding and subtracting fractions and mixed numbers.
Section 1
Adding Fractions with Unlike Denominators
To add fractions with unlike denominators, convert them to equivalent fractions with a common denominator, then add the numerators. A common denominator can be found by multiplying the two denominators.
Section 2
Subtracting Fractions with Unlike Denominators
To subtract fractions with unlike denominators, find a common denominator and convert each fraction to an equivalent fraction with that denominator.
Then, subtract the numerators.
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Section 1
Adding Fractions with Unlike Denominators
To add fractions with unlike denominators, convert them to equivalent fractions with a common denominator, then add the numerators. A common denominator can be found by multiplying the two denominators.
Section 2
Subtracting Fractions with Unlike Denominators
To subtract fractions with unlike denominators, find a common denominator and convert each fraction to an equivalent fraction with that denominator.
Then, subtract the numerators.
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter