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

What is the process of adding rational numbers?

Back

To add rational numbers, convert them to a common denominator if they are fractions, then add the numerators and keep the denominator the same.

Front

What is the process of subtracting rational numbers?

Back

To subtract rational numbers, convert them to a common denominator if they are fractions, then subtract the numerators and keep the denominator the same.

Front

What is the least common denominator (LCD)?

Back

The least common denominator (LCD) is the smallest multiple that is common to the denominators of two or more fractions.

Front

How do you find the LCD of 6 and 9?

Back

The multiples of 6 are 6, 12, 18, 24, 30, 36... and the multiples of 9 are 9, 18, 27, 36... The LCD is 18.

Front

What is the result of -23.4 - 3.4?

Back

-26.8

Front

Back

-.025

Front

When subtracting a positive number from a negative number, what is the result?

Back

The result is more negative. For example, -5 - 3 = -8.

Front

What is the result of -40 + 15.05?

Back

-24.95

Front

When adding two negative numbers, what is the result?

Back

The result is negative. For example, -3 + (-2) = -5.