Adding Rational Numbers Fractions (Example)

The video tutorial explains how to add mixed numbers with the same sign. It starts with an example of adding negative mixed numbers, emphasizing the need to add their absolute values. The process involves finding a common denominator, regrouping fractions, and determining the sign of the sum. The tutorial concludes that the sum of two negative mixed numbers is also negative.

What is the first step when adding mixed numbers with the same sign?

• Divide the numbers

• Multiply the numbers

• Add the absolute values of the numbers

• Subtract the smaller number from the larger number

Why do we need a common denominator when adding fractions?

• To make the fractions easier to subtract

• To ensure the fractions have the same base for addition

• To convert fractions into whole numbers

• To simplify the fractions

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

• 6

• 2

• 12

• 3

After adding the fractions, what is the next step if the result is an improper fraction?

• Convert it into a mixed number

• Multiply by the denominator

• Leave it as it is

• Subtract the numerator from the denominator

If both numbers being added are negative, what will be the sign of the sum?

• Negative

• Positive

• Zero

• It depends on the numbers