Subtracting Fractions and Mixed Numbers

In this lesson, students learn to subtract fractions with unlike units by finding a common denominator. The teacher demonstrates the process using examples, including subtracting mixed numbers by separating whole numbers and fractions. The lesson concludes with encouragement to practice the exit ticket and a preview of the next lesson.

What is the first step in subtracting fractions with unlike denominators?

• Add the fractions directly.

• Find a common denominator.

• Multiply the fractions.

• Convert fractions to decimals.

What is the least common denominator for the fractions 3/4 and 3/10?

• 40

• 20

• 30

• 10

After finding a common denominator, what is the next step in subtracting 3/4 and 3/10?

• Subtract the numerators.

• Add the numerators.

• Multiply the numerators.

• Divide the numerators.

What is the final result of subtracting 3/4 and 3/10?

• 11/20

• 7/20

• 9/20

• 5/20

What is the final result of subtracting 3/4 and 3/10?

• 5/20

• 11/20

• 7/20

• 9/20

When subtracting mixed numbers, what is one method you can use?

• Subtract the fractions first.

• Add the whole numbers first.

• Convert to improper fractions.

• Subtract the whole numbers first.

What is the result of subtracting the whole numbers 3 and 1?

• 4

• 3

• 2

• 1

What is the first step in subtracting mixed numbers?

• Subtract the fractions first.

• Convert to improper fractions.

• Subtract the whole numbers first.

• Add the whole numbers first.

What is the first step in subtracting the fractional parts of mixed numbers?

• Convert to decimals.

• Multiply the fractions.

• Find a common denominator.

• Add the fractions.

What is the least common denominator for the fractions 1/2 and 1/3?

• 6

• 5

• 3

• 2