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 the same sign?

Back

When adding two rational numbers with the same sign, you add their absolute values and keep the common sign.

Front

How do you add two rational numbers with different signs?

Back

When adding two rational numbers with different signs, you subtract the smaller absolute value from the larger absolute value and take the sign of the number with the larger absolute value.

Front

What is the result of (-⅚) - (⅗)?

Back

-1 13/30

Front

What is the result of -40 + 15.05?

Back

-24.95

Front

When adding decimals with the same sign, you...

Back

add and keep the sign.

Front

What is the value of 18 - 23.2?

Back

-5.2

Front

What is the result of -23.4 - 3.4?

Back

-26.8

Front

What is the first step in subtracting rational numbers?

Back

Convert the numbers to have a common denominator if they are fractions.

Front

What does it mean to simplify a fraction?

Back

To simplify a fraction means to reduce it to its lowest terms by dividing the numerator and denominator by their greatest common divisor.