Operations with Rational Numbers Review

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 evaluate the expression –1.5 – (–6.3)?

Back

To evaluate the expression, you add the two numbers: -1.5 + 6.3 = 4.8.

Front

What is the result of dividing 6.72 by -1.2?

Back

The result of dividing 6.72 by -1.2 is -5.6.

Front

How do you simplify the expression 10.8 - (-6.4)?

Back

To simplify, you change the subtraction of a negative to addition: 10.8 + 6.4 = 17.2.

Front

What is the product of 8.2 and -7?

Back

The product of 8.2 and -7 is -57.4.

Front

What is the process for adding two rational numbers?

Back

To add two rational numbers, find a common denominator if necessary, convert the numbers, and then add the numerators.

Front

What is the process for subtracting rational numbers?

Back

To subtract rational numbers, find a common denominator, convert the numbers, and then subtract the numerators.

Front

How do you multiply two rational numbers?

Back

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

Front

What is the rule for dividing rational numbers?

Back

To divide rational numbers, multiply by the reciprocal of the divisor.

Front

What is the significance of the negative sign in rational numbers?

Back

The negative sign indicates that the number is less than zero, affecting the direction of the number on the number line.