Adding Like and Unlike Fractions | EasyTeaching

The video tutorial explains how to add fractions with the same denominator, known as like fractions, by simply adding the numerators. It then covers adding unlike fractions by converting them into like fractions using a common denominator. The tutorial distinguishes between related fractions, which have denominators that are multiples of each other, and unrelated fractions, which do not. For unrelated fractions, the lowest common multiple is used to find a common denominator. The video includes examples and practice problems to reinforce these concepts.

What is the key characteristic of like fractions?

• They have different numerators.

• They have the same denominator.

• They have different denominators.

• They have the same numerator.

When adding unlike fractions, what is the first step?

• Find a common numerator.

• Convert them into like fractions.

• Subtract the denominators.

• Add the numerators directly.

What rule must be followed when converting fractions to like fractions?

• Change the fraction to a decimal.

• Perform the same operation on both numerator and denominator.

• Only change the denominator.

• Only change the numerator.

What defines related fractions?

• Their numerators are multiples of each other.

• They have the same denominator.

• Their denominators are multiples of each other.

• They have the same numerator.

How do you find the lowest common multiple of two denominators?

• List the multiples of each denominator and find the smallest common one.

• Multiply the numerators together.

• Divide the larger denominator by the smaller one.

• Add the denominators together.

What is the lowest common multiple of 3 and 5?

• 20

• 10

• 15

• 25

In the example 3/4 + 2/5, what is the common denominator used?

• 25

• 10

• 20

• 15