Operations with 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 result of -5.7 + 0.9?

Back

-4.8

Front

How do you subtract a rational number from another?

Back

To subtract a rational number, you can add its opposite. For example, a - b is the same as a + (-b).

Front

What is the result of -7.79 + 5.4?

Back

-2.39

Front

How do you divide a decimal by a whole number?

Back

To divide a decimal by a whole number, move the decimal point in the dividend (the number being divided) to the right as many places as needed to make it a whole number, and then divide.

Front

What is the result of 0.729 ÷ 1.5?

Back

0.486

Front

What is the process for multiplying two rational numbers?

Back

To multiply two rational numbers, multiply the numerators together and the denominators together.

Front

What is a mixed number?

Back

A mixed number is a whole number combined with a proper fraction, such as 1 1/2.

Front

How do you convert a mixed number to an improper fraction?

Back

To convert a mixed number to an improper fraction, multiply the whole number by the denominator, add the numerator, and place that over the original denominator.