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 rewrite a subtraction problem as an addition problem?

Back

To rewrite a subtraction problem as an addition problem, change the subtraction of a number to the addition of its opposite. For example, -5.66 - (-4.1) becomes -5.66 + 4.1.

Front

What is the result of 3 + (-7)?

Back

-4

Front

What is the sum of 4/9 and -2/3?

Back

-2/9

Front

What is -7 - 2?

Back

-9

Front

What is -23.4 - 3.4?

Back

-26.8

Front

What is the opposite of a positive number?

Back

The opposite of a positive number is its negative counterpart. For example, the opposite of +5 is -5.

Front

What does it mean to add a negative number?

Back

Adding a negative number is the same as subtracting the absolute value of that number. For example, 5 + (-3) is the same as 5 - 3.

Front

How do you find the sum of two rational numbers with different denominators?

Back

To find the sum of two rational numbers with different denominators, first find a common denominator, convert the fractions, and then add the numerators.

Front

What is the result of adding two negative numbers?

Back

The result of adding two negative numbers is always a negative number. For example, -3 + (-2) = -5.