TOPIC 7

Use Equivalent Fractions to Add and Subtract Fractions

Students will estimate sums and differences of fractions by using the nearest half or whole number, and find common denominators for fractions with unlike denominators.  They will add fractions with unlike denominators using equivalent fractions that have common denominators and subtract fractions with unlike denominators.  Students will write equivalent fractions to add and subtract fractions with unlike denominators and estimate sums and differences of fractions and mixed numbers.  Next, they’ll add mixed numbers using models and add mixed numbers using equivalent fractions and a common denominator.  They’ll use models to subtract missed numbers and subtract mixed numbers using equivalent fractions and a common denominator.  They will add and subtract mixed numbers using equivalent fractions and a common denominator, and represent a problem situation with a mathematical model.