Evaluating Expressions 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

Evaluate the expression a + (-b) when a = -7 and b = -3.

Back

-4

Front

What does the negative sign in front of a variable indicate?

Back

The negative sign indicates that the value of the variable is to be taken as its opposite.

Front

Evaluate -b when b = 12.

Back

-12

Front

What is the result of multiplying a negative number by a positive number?

Back

The result is a negative number.

Front

Evaluate 9a when a = -3.

Back

-27

Front

What is the result of multiplying two negative numbers?

Back

The result is a positive number.

Front

Evaluate -5a when a = -4.

Back

20

Front

Evaluate a + (-b) when a = 15 and b = 6.

Back

9

Front

What is the value of a + (-b) if a = 0 and b = 5?

Back

-5