Adding and subtracting rational numbers

Front

What is a rational number?

Back

A rational number is any number that can be expressed as the quotient or fraction of two integers, where the denominator is not zero.

Front

How do you add two rational numbers with different denominators?

Back

To add two rational numbers with different denominators, find a common denominator, convert each fraction, and then add the numerators.

Front

What is the process for subtracting rational numbers?

Back

To subtract rational numbers, find a common denominator, convert each fraction, and then subtract the numerators.

Front

What is the value of the expression 2/5 - (-5/6)?

Back

37/30

Front

Is 2/5 - (-5/6) positive, negative, or zero?

Back

Positive

Front

What is the value of the expression -1/3 - 4/5?

Back

-17/15

Front

What is the value of the expression (-8.6) + 7.2?

Back

-1.4

Front

What is the value of the expression 3.1 + (-6.3)?

Back

-3.2

Front

What does it mean to have a negative rational number?

Back

A negative rational number is a number that is less than zero and can be expressed as a fraction with a negative numerator or denominator.

Front

How do you determine if the result of adding two rational numbers is positive or negative?

Back

To determine if the result is positive or negative, compare the absolute values of the numbers being added or subtracted.