Mastering Addition and Subtraction of Fractions and Mixed Numbers

This video tutorial covers the process of adding and subtracting fractions and mixed numbers. It emphasizes the importance of having a common denominator and explains how only numerators are added or subtracted. The tutorial also discusses simplifying fractions and provides methods for handling mixed numbers, including converting them to improper fractions or dealing with them separately. Several examples illustrate these concepts, showing both addition and subtraction of fractions and mixed numbers.

What is the first step in adding or subtracting fractions?

• Combine the numerators

• Find a common denominator

• Simplify the fractions

• Convert to mixed numbers

Tags

CCSS.7.NS.A.1C

When adding fractions, which part of the fraction changes?

• Denominator

• Whole number

• Numerator

• Both numerator and denominator

Tags

CCSS.4.NF.B.3D

CCSS.4.NF.B.3C

What should you do if you can reduce your fractions after adding or subtracting them?

• Multiply them by a common factor

• Convert them to mixed numbers

• Leave them as they are

• Simplify them

What is the 'failsafe' method for dealing with mixed numbers?

• Use a calculator

• Subtract the fractions first

• Add the whole numbers first

• Convert to improper fractions

Tags

CCSS.7.NS.A.1C

How do you find the common denominator for fractions?

• Find the least common multiple

• Divide the denominators

• Multiply the denominators

• Add the denominators

What is the common denominator for 1/2 and 2/5?

• 5

• 20

• 10

• 15

In the example of subtracting 7/12 and 1/6, what is the common denominator?

• 24

• 6

• 12

• 18

Tags

CCSS.7.NS.A.1C

When adding mixed numbers, what is one method to simplify the process?

• Convert to improper fractions

• Add the whole numbers and fractions separately

• Subtract the fractions first

• Use a calculator

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the result of 6 1/4 + 2 1/5 when using the method of adding whole numbers and fractions separately?

• 9 1/5

• 8 9/20

• 8 1/2

• 9 1/4

Tags

CCSS.7.NS.A.1C

What should you do if the fraction part of a mixed number subtraction results in a negative value?

• Convert to improper fractions

• Borrow from the whole number

• Ignore the negative value

• Add the fractions instead

Tags

CCSS.7.NS.A.1C