Adding Rational Numbers Fractions

The video tutorial explains how to add rational numbers, focusing on the rules for adding integers. It covers the process of adding numbers with the same and different signs, using examples with fractions. The tutorial demonstrates how to find a common denominator and determine the sign of the sum, concluding with a summary of the lesson.

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

• Convert them to decimals.

• Find a common denominator.

• Add their absolute values and keep the same sign.

• Subtract their absolute values and keep the sign of the larger number.

When adding rational numbers with different signs, what should you do after finding their absolute values?

• Divide the larger absolute value by the smaller one.

• Multiply the absolute values.

• Subtract the smaller absolute value from the larger one.

• Add the absolute values.

In the example given, what is the common denominator used for the fractions 4/5 and 9/10?

• 10

• 9

• 15

• 5

What determines the sign of the sum when adding two rational numbers with different signs?

• The sign of the number with the larger absolute value.

• The sign of the second number.

• The sign of the number with the smaller absolute value.

• The sign of the first number.

What is the final result of adding -4/5 and 9/10?

• Positive 9/10

• Negative 1/10

• Positive 1/10

• Zero